Here are 100 books that Threat on the Horizon fans have personally recommended if you like Threat on the Horizon. Shepherd is a community of 12,000+ authors and super readers sharing their favorite books with the world.

When you buy books, we may earn a commission that helps keep our lights on (or join the rebellion as a member).

Book cover of The Secret World: A History of Intelligence

Duncan Falconer Author Of First into Action

From my list on providing a unique insight into military history.

Why am I passionate about this?

I must be something of a specialist on the impact of conventional and guerrilla warfare on the civilian population. Truth is, leaving school, I never intended to have anything to do with war beyond the books I enjoyed reading. On leaving the military in my 30s I employed the only skills I had and managed organisations and mostly news teams operating in conflict zones all over the world. I matured into a crisis manager, responding and consulting to crisis situations such as kidnap & ransoms, and evacuations from conflict zones. Most of the characters in my books are real, good and bad, taken from the vast theatre of my own experiences. 

Duncan's book list on providing a unique insight into military history

Duncan Falconer Why Duncan loves this book

My line of work has only enhanced my fascination with spies and spying. Espionage was on the periphery of my world and I was privy, on occasion, to snippets of information that shed light on certain events. Reading this book was like being privy to a host of secrets, many during my own era. How fascinating to be taken through the history of espionage from biblical times until today. The author reveals missing pieces to many significant moments in history, where monumental decisions were made based on information bought and sold, died for, killed for, stolen, or extracted by torture or coercion. Equally fascinating is how so much of that information was misinterpreted, denied, ignored, inflated, or simply misplaced. Great battles were won and lost, kingdoms toppled, fortunes spent and made, often based on a single snippet of information.

By Christopher Andrew ,

Why should I read it?

3 authors picked The Secret World as one of their favorite books, and they share why you should read it.

What is this book about?

'Almost every page includes a sizzling historical titbit ... captivating, insightful and masterly' (Edward Lucas, The Times)

The history of espionage is far older than any of today's intelligence agencies, yet the long history of intelligence operations has been largely forgotten. The first mention of espionage in world literature is in the Book of Exodus.'God sent out spies into the land of Canaan'. From there, Christopher Andrew traces the shift in the ancient world from divination to what we would recognize as attempts to gather real intelligence in the conduct of military operations, and considers how far ahead of the…


If you love Threat on the Horizon...

Ad

Book cover of The High House

The High House by James Stoddard,

The Victorian mansion, Evenmere, is the mechanism that runs the universe.

The lamps must be lit, or the stars die. The clocks must be wound, or Time ceases. The Balance between Order and Chaos must be preserved, or Existence crumbles.

Appointed the Steward of Evenmere, Carter Anderson must learn the…

Book cover of The Black Door: Spies, Secret Intelligence and British Prime Ministers

David P. Oakley Author Of Subordinating Intelligence: The DoD/CIA Post-Cold War Relationship

From my list on history, personalities, activities of intelligence.

Why am I passionate about this?

My fascination with intelligence studies is tied to my previous experience as a practitioner. While serving as a military officer and CIA officer, I became curious about how two organizations with a shared history could be so different. Exploring the “why” of the CIA/DoD differences led me to the broader interplay of organizational cultures, individuals, and missions in influencing the evolution of intelligence, its purpose, and its role. These five books will provide the reader a broader appreciation of how intelligence was used to help policymakers understand reality and how intelligence organizations have been used to try to change reality. You will not merely learn something about intelligence but will be entertained and engaged while doing so. 

David's book list on history, personalities, activities of intelligence

David P. Oakley Why David loves this book

I am fascinated by how different countries approach intelligence, both from how they organize intelligence activities and how intelligence informs policymaking. These various approaches highlight there is not a common approach to intelligence and help explain why simple definitions of intelligence are insufficient at capturing various intelligence activities and organizations. The Black Door looks at how British Prime Ministers have used intelligence and their relationships with intelligence organizations over the past century. A well-written account by two thoughtful and prolific scholars, the reader will appreciate how British Prime Ministers have used intelligence to not only understand the world but to also act.  

By Richard J. Aldrich , Rory Cormac ,

Why should I read it?

1 author picked The Black Door as one of their favorite books, and they share why you should read it.

What is this book about?

The Black Door explores the evolving relationship between successive British prime ministers and the intelligence agencies, from Asquith's Secret Service Bureau to Cameron's National Security Council.

Intelligence can do a prime minister's dirty work. For more than a century, secret wars have been waged directly from Number 10. They have staved off conflict, defeats and British decline through fancy footwork, often deceiving friend and foe alike. Yet as the birth of the modern British secret service in 1909, prime ministers were strangers to the secret world - sometimes with disastrous consequences. During the Second World War, Winston Churchill oversaw a…


Book cover of Spy Chiefs: Volume 1: Intelligence Leaders in the United States and United Kingdom

David P. Oakley Author Of Subordinating Intelligence: The DoD/CIA Post-Cold War Relationship

From my list on history, personalities, activities of intelligence.

Why am I passionate about this?

My fascination with intelligence studies is tied to my previous experience as a practitioner. While serving as a military officer and CIA officer, I became curious about how two organizations with a shared history could be so different. Exploring the “why” of the CIA/DoD differences led me to the broader interplay of organizational cultures, individuals, and missions in influencing the evolution of intelligence, its purpose, and its role. These five books will provide the reader a broader appreciation of how intelligence was used to help policymakers understand reality and how intelligence organizations have been used to try to change reality. You will not merely learn something about intelligence but will be entertained and engaged while doing so. 

David's book list on history, personalities, activities of intelligence

David P. Oakley Why David loves this book

I think it is important to consider how leaders shape organizations and how the evolution of an organization might have been different under another person. To appreciate how/why intelligence organizations evolved we must appreciate the influence of intelligence leaders. For example, John Deutch and Stanfield Turner not only created tension within the CIA during their tenure, but their poor decisions affected the organization long after their departure. This edited volume looks at the personalities of U.S. and U.K. intelligence leaders and their influence on intelligence. Although the book touches on some of the more familiar names such as Wild Bill Donovan, its authors also explore lesser-known leaders whose influence on their organization and the broader community was significant. A must-read for anyone wanting to appreciate how individuals shape intelligence! I also encourage you to pick up volume 2 to learn about intelligence leaders throughout the world.

By Christopher Moran (editor) , Mark Stout (editor) , Ioanna Iordanou (editor) , Paul Maddrell (editor)

Why should I read it?

1 author picked Spy Chiefs as one of their favorite books, and they share why you should read it.

What is this book about?

In literature and film the spy chief is an all-knowing, all-powerful figure who masterfully moves spies into action like pieces on a chessboard. How close to reality is that depiction, and what does it really take to be an effective leader in the world of intelligence? This first volume of Spy Chiefs broadens and deepens our understanding of the role of intelligence leaders in foreign affairs and national security in the United States and United Kingdom from the early 1940s to the present. The figures profiled range from famous spy chiefs such as William Donovan, Richard Helms, and Stewart Menzies…


If you love Loch K. Johnson...

Ad

Book cover of December on 5C4

December on 5C4 by Adam Strassberg,

Magical realism meets the magic of Christmas in this mix of Jewish, New Testament, and Santa stories–all reenacted in an urban psychiatric hospital!

On locked ward 5C4, Josh, a patient with many similarities to Jesus, is hospitalized concurrently with Nick, a patient with many similarities to Santa. The two argue…

Book cover of Statecraft by Stealth: Secret Intelligence and British Rule in Palestine

David P. Oakley Author Of Subordinating Intelligence: The DoD/CIA Post-Cold War Relationship

From my list on history, personalities, activities of intelligence.

Why am I passionate about this?

My fascination with intelligence studies is tied to my previous experience as a practitioner. While serving as a military officer and CIA officer, I became curious about how two organizations with a shared history could be so different. Exploring the “why” of the CIA/DoD differences led me to the broader interplay of organizational cultures, individuals, and missions in influencing the evolution of intelligence, its purpose, and its role. These five books will provide the reader a broader appreciation of how intelligence was used to help policymakers understand reality and how intelligence organizations have been used to try to change reality. You will not merely learn something about intelligence but will be entertained and engaged while doing so. 

David's book list on history, personalities, activities of intelligence

David P. Oakley Why David loves this book

The relationship between intelligence and policy and how various countries employ intelligence organizations are two important topics that are not fully explored. Wagner’s book looks at the role played by British intelligence in Palestine during the interwar period---a role that went beyond what many consider intelligence functions. As Wagner explains, British intelligence not only informed policymakers’ thinking but was also involved in the execution of policy in the Palestinian territory during this period. This combined, no better yet intertwined, history of British policy and intelligence during this important period is something that intelligence and regional scholars should read. 

By Steven B. Wagner ,

Why should I read it?

1 author picked Statecraft by Stealth as one of their favorite books, and they share why you should read it.

What is this book about?

Britain relied upon secret intelligence operations to rule Mandatory Palestine. Statecraft by Stealth sheds light on a time in history when the murky triad of intelligence, policy, and security supported colonial governance. It emphasizes the role of the Anglo-Zionist partnership, which began during World War I and ended in 1939, when Britain imposed severe limits on Jewish immigration and settlement in Palestine.

Steven Wagner argues that although the British devoted considerable attention to intelligence gathering and analysis, they never managed to solve the basic contradiction of their rule: a dual commitment to democratic self-government and to the Jewish national home…


Book cover of The Mission

M. B. Courtenay Author Of A Spy Inside the Castle

From my list on how the world actually works.

Why am I passionate about this?

I write spy fiction because I’ve lived close to the seams of power—working and traveling across the U.S., Europe, and China—and I’m obsessed with how ideas turn into decisions. I read philosophy for clarity, history for humility, and intelligence studies for the uncomfortable truth that good intentions aren’t enough.

My novel, A Spy Inside the Castle, grew from years of research and the harder work of translating it into human stakes. I’m passionate about books that illuminate secrecy and strategy without losing sight of people. These five shaped my thinking and, more importantly, kept me honest on the page.

M. B.'s book list on how the world actually works

M. B. Courtenay Why M. B. loves this book

I read The Mission because it opened my eyes to the real story behind the headlines.

Weiner takes you inside CIA missions from the 21st century and shows what was happening behind the curtain while the public only saw the surface.

I was struck by how different the secret history looks compared to the official version. He makes you feel like you’re finally getting the account that no one saw at the time. For me, that transparency is incredibly powerful.

By Tim Weiner ,

Why should I read it?

1 author picked The Mission as one of their favorite books, and they share why you should read it.

What is this book about?

'No one has opened up the CIA to us like Weiner has, and The Mission deserves to win him a second Pulitzer' JOHN SIMPSON, GUARDIAN

The epic successor to Tim Weiner's National Book Award-winning classic, Legacy of Ashes: a gripping and revelatory history of the CIA in the 21st century, reaching from 9/11 through the wars in Afghanistan and Iraq to today's battles with Russia and China - and with the President of the United States.

At the turn of the century, the Central Intelligence Agency was in crisis. The end of the Cold War had robbed the agency of…


Book cover of Legacy of Ashes: The History of the CIA

Luca Trenta Author Of The President's Kill List: Assassination and Us Foreign Policy Since 1945

From my list on the CIA real stories and histories.

Why am I passionate about this?

Green tracers in the sky over Baghdad. My first political memory is the start of the Gulf War in 1991. I remember writing angry essays criticizing the US decision to invade Iraq in 2003 for my high-school assignments. I have always been interested in US foreign policy and in how presidents make decisions. During my PhD, as I was working on a chapter on the origins of the Cuban Missile Crisis, I discovered the extent and–frankly–the madness of some of the plots the CIA and the White House concocted against Fidel Castro. More recently, the US government’s use of assassination and “targeted killings” have become the focus of my research. 

Luca's book list on the CIA real stories and histories

Luca Trenta Why Luca loves this book

Is this the best book on the Agency, probably not. Is this a full history? No again. But it is the first book I bought and read on the Agency, and it kickstarted my passion for secrecy and covert action. I found the account, perhaps, a bit biased. There aren’t only failures in the history of the CIA, but the failures sure are many, and Weiner portrays them with accuracy and flair. The degree of access to participants is also exceptional, and I was drawn immediately into the Agency schemes.

How many failures can an Agency take? How can we reconcile secrecy with a democratic society? After reading the book, I felt like I did not have all the answers, but I certainly wanted to find out more. The book’s story ended in 2007, but a sequel is coming in 2025.

By Tim Weiner ,

Why should I read it?

1 author picked Legacy of Ashes as one of their favorite books, and they share why you should read it.

What is this book about?

With shocking revelations that made headlines in papers across the country, Pulitzer-Prize-winner Tim Weiner gets at the truth behind the CIA and uncovers here why nearly every CIA Director has left the agency in worse shape than when he found it; and how these profound failures jeopardize our national security.


If you love Threat on the Horizon...

Ad

Book cover of Trusting Her Duke

Trusting Her Duke by Arietta Richmond,

A Duke with rigid opinions, a Lady whose beliefs conflict with his, a long disputed parcel of land, a conniving neighbour, a desperate collaboration, a failure of trust, a love found despite it all.

Alexander Cavendish, Duke of Ravensworth, returned from war to find that his father and brother had…

Book cover of Blind Over Cuba: The Photo Gap and the Missile Crisis

Sheldon M. Stern Author Of The Week the World Stood Still: Inside the Secret Cuban Missile Crisis

From my list on Cuban Missile Crisis.

Why am I passionate about this?

In early 1981, the JFK Library began the process of declassifying the Cuban missile crisis ExComm tapes; as the Library’s Historian, the responsibility for reviewing these recordings was mine—and it changed my life. I spent most of the next two years listening to the tapes from the legendary 13 Days (and subsequently from the November “post-crisis”). I was the first non-ExComm participant and professional historian to hear and evaluate these unique and definitive historical recordings. After the tapes were declassified in the late 1990s, I wrote three books (published by Stanford University Press) about their historical importance.

Sheldon's book list on Cuban Missile Crisis

Sheldon M. Stern Why Sheldon loves this book

In 1960, a planned summit meeting in Paris between the US, the USSR, England, and France was suddenly jeopardized when an American U-2 spy plane was shot down over Russia and the pilot captured. Khrushchev demanded an end to the flights and an apology. President Eisenhower agreed to suspend flights until the end of his term (nine months later), but the Soviet leader angrily denounced the offer and returned to Moscow. Ironically, President Kennedy’s concern in 1962 about “another U-2 crisis” convinced him to suspend U-2 flights over Cuba—a pause that lasted from late August to early October. JFK did agree to authorize one flight over western Cuba in response to pressure from CIA director John McCone—and the missiles were luckily discovered just before they had become operational.

By David M. Barrett , Max Holland ,

Why should I read it?

1 author picked Blind Over Cuba as one of their favorite books, and they share why you should read it.

What is this book about?

In the aftermath of the Cuban Missile Crisis, questions persisted about how the potential cataclysm had been allowed to develop. A subsequent congressional investigation focused on what came to be known as the "photo gap": five weeks during which intelligence-gathering flights over Cuba had been attenuated.

In Blind over Cuba, David M. Barrett and Max Holland challenge the popular perception of the Kennedy administration's handling of the Soviet Union's surreptitious deployment of missiles in the Western Hemisphere. Rather than epitomizing it as a masterpiece of crisis management by policy makers and the administration, Barrett and Holland make the case that…


Book cover of The Hawk and the Dove

Lawrence J. Haas Author Of Harry and Arthur: Truman, Vandenberg, and the Partnership That Created the Free World

From my list on America and the age-old fight for freedom.

Why am I passionate about this?

I’ve always loved history, especially U.S. history, and, as a White House official for President Clinton, I saw it made up close. As a historian, I have focused in particular on America’s role in the world ever since the terrorist attacks of September 11, 2001, when I came to recognize that President Kennedy was right: “Domestic policy can hurt you, but foreign policy can kill you.” Over the last quarter-century, I’ve concentrated my work on America’s efforts to lead the West and promote freedom around the world. I read voraciously, write a column on foreign policy for leading outlets, and discuss global affairs often on TV and radio.

Lawrence's book list on America and the age-old fight for freedom

Lawrence J. Haas Why Lawrence loves this book

I love this book because I miss the days when people of great influence in America disagreed vociferously about important matters but remained good friends. Top State and Defense Department official Paul Nitze and legendary diplomat and writer George Kennan were the ying and yang of America’s post-World War II foreign policy–the former a brusque “hawk,” the latter a soft-spoken “dove.”

They battled in the halls of power and in public forums throughout the Cold War, each hoping to implant his views on U.S. foreign policy. Nitze lived to 97, Kennan to 101, and they were close pals to the very end. I wish we’d see more of that warm and friendly competition in Washington today.

By Nicholas Thompson ,

Why should I read it?

1 author picked The Hawk and the Dove as one of their favorite books, and they share why you should read it.

What is this book about?

A brilliant and revealing biography of the two most important Americans during the Cold War era—written by the grandson of one of them

Only two Americans held positions of great influence throughout the Cold War; ironically, they were the chief advocates for the opposing strategies for winning—and surviving—that harrowing conflict. Both men came to power during World War II, reached their professional peaks during the Cold War’s most frightening moments, and fought epic political battles that spanned decades. Yet despite their very different views, Paul Nitze and George Kennan dined together, attended the weddings of each other’s children, and remained…


Book cover of The Peacemaker: Ronald Reagan, the Cold War, and the World on the Brink

Mark G. Pomar Author Of Cold War Radio: The Russian Broadcasts of the Voice of America and Radio Free Europe/Radio Liberty

From my list on critical world events from a new angle.

Why am I passionate about this?

Since I read George Kennan’s award-winning memoirs when I was still in high school, I have been fascinated by world history in general and specifically by the Soviet Union (Russia) and Central/Eastern Europe. I have a PhD in Russian studies and my 40+ year career has included academia, government, non-profit organizations, and the foundation sector. My professional experience has reinforced my belief that to understand today’s world and to formulate effective national security strategy one must study the roots of political, economic, or social events.   

Mark's book list on critical world events from a new angle

Mark G. Pomar Why Mark loves this book

In The Peacemaker, William Inboden draws on declassified materials, interviews with high-level government officials, and on Reagan’s personal diary to write the most thorough, fair, and scrupulously researched account of Reagan’s foreign policy and the successful end of the Cold War.

And he does this with such aplomb that his history reads like a novel. I worked in the US government in the 1980s and thought I knew Reagan’s foreign policy well, but I discovered much that was new and couldn’t put the book down.

By William Inboden ,

Why should I read it?

2 authors picked The Peacemaker as one of their favorite books, and they share why you should read it.

What is this book about?

One of the Wall Street Journal’sbest political books of 2022

A masterful account of how Ronald Reagan and his national security team confronted the Soviets, reduced the nuclear threat, won the Cold War, and supported the spread of freedom around the world.

“Remarkable… a great read.”—Robert Gates • “Mesmerizing… hard to put down.”—Paul Kennedy • “Full of fresh information… will shape all future studies of the role the United States played in ending the Cold War.”—John Lewis Gaddis • “A major contribution to our understanding of the Reagan presidency and the twilight of the Cold War era.”—David Kennedy

With decades…


If you love Loch K. Johnson...

Ad

Book cover of Aggressor

Aggressor by FX Holden,

It is April 1st, 2038. Day 60 of China's blockade of the rebel island of Taiwan.

The US government has agreed to provide Taiwan with a weapons system so advanced that it can disrupt the balance of power in the region. But what pilot would be crazy enough to run…

Book cover of Chronology of a Coverup, 1941-1973

DC Alden Author Of The Angola Deception

From my list on coverups and conspiracies.

Why am I passionate about this?

I’ve always been a voracious reader, and from an early age I was drawn to military, political, and science fiction thrillers because they explored a world of black operations, ruthless cabals, and clandestine government programmes. Later, I discovered that such a world exists, one where the military-industrial complex exerts enormous power and influence, a world of secretive global agendas, of dark actors controlling corrupt politicians, and cold-blooded military contractors, their allegiances no longer tied to any national flag but to mega-wealth cabals, offshore accounts, and vast pension funds. A world of shadows, where the light rarely shines, and the truth remains hidden. A truth often stranger than fiction.

DC's book list on coverups and conspiracies

DC Alden Why DC loves this book

The first of a two-book series by accomplished historian Richard Dolan, this volume explores a bizarre and mystifying phenomenon that has fascinated me since I was a young boy, and later inspired me to write my own sci-fi thriller. In his book, Dolan proves beyond doubt that the CIA, NSA, FBI, and the USAF held a far deeper interest in the subject than publicly stated, an interest that often bordered on fear when mysterious, intelligently controlled aircraft violated US-restricted airspace at will. And continue to do so. Well-researched and meticulously referenced, Dolan’s series should be enough to convince the die-hard sceptics that whatever is travelling across our skies, it is beyond our current understanding. 

By Richard Dolan ,

Why should I read it?

1 author picked Chronology of a Coverup, 1941-1973 as one of their favorite books, and they share why you should read it.

What is this book about?

Richard M. Dolan is a gifted historian whose study of U.S. Cold War strategy led him to the broader context of increased security measures and secrecy since World War II. One aspect of such government policies that has continued to hold the public's imagination for over half a century is the question of unidentified flying objects.

UFOs and the National Security State is the first volume of a two-part detailed chronological narrative of the national security dimensions of the UFO phenomenon from 1941 to the present. Working from hundreds of declassified records and other primary and secondary sources, Dolan centers…


Book cover of The Secret World: A History of Intelligence
Book cover of The Black Door: Spies, Secret Intelligence and British Prime Ministers
Book cover of Spy Chiefs: Volume 1: Intelligence Leaders in the United States and United Kingdom

Share your top 3 reads of 2025!

And get a beautiful page showing off your 3 favorite reads.

1,210

readers submitted
so far, will you?

5 book lists we think you will like!

Interested in national security, intelligence agency, and the Cold War?

The Cold War 281 books