Here are 100 books that 21 Lessons for the 21st Century fans have personally recommended if you like 21 Lessons for the 21st Century. 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 A Question of Standing: The History of the CIA

Yakov Ben-Haim Author Of The Dilemmas of Wonderland: Decisions in the Age of Innovation

From my list on making decisions when you don’t know what’s going on.

Why am I passionate about this?

I am a retired university professor. My research, in which I am still actively engaged, deals with decision-making under deep uncertainty: how to make a decision, or design a project, or plan an operation when major relevant factors are unknown or highly uncertain. I developed a decision theory called info-gap theory that grapples with this challenge, and is applied around the world in many fields, including engineering design, economics, medicine, national security, biological conservation, and more.

Yakov's book list on making decisions when you don’t know what’s going on

Yakov Ben-Haim Why Yakov loves this book

This is an interesting collection of essays on the history of the CIA.

A spy agency thrives on deceit and uncertainty, making plans and taking actions when the adversary also thrives on those same elements.

Arranged in chronological order, the essays cover nearly 20 different incidents, describing the challenges, uncertainties, goals, and decisions made by both high-level political decision-makers and practitioners in the field.

Topics covered include early stages in the development of the CIA (founded in 1947), including covert action against the Soviet Union in the 1950s, the Bay of Pigs (1961), the Iran-Contra affair (mid-1980s), up to more recent events with bin Laden, fake news, and more.

By Rhodri Jeffreys-Jones ,

Why should I read it?

2 authors picked A Question of Standing as one of their favorite books, and they share why you should read it.

What is this book about?

A Question of Standing deals with recognizable events that have shaped the history of the first 75 years of the CIA. Unsparing in its accounts of dirty tricks and their consequences, it values the agency's intelligence and analysis work to offer balanced judgements that avoid both celebration and condemnation of the CIA.

The mission of the CIA, derived from U-1 in World War I more than from World War II's OSS, has always been intelligence. Seventy-five years ago, in the year of its creation, the National Security Act gave the agency, uniquely in world history up to that point, a…


If you love 21 Lessons for the 21st Century...

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 Studies in Generalship: Lessons from the Chiefs of Staff of the Israel Defense Forces

Yakov Ben-Haim Author Of The Dilemmas of Wonderland: Decisions in the Age of Innovation

From my list on making decisions when you don’t know what’s going on.

Why am I passionate about this?

I am a retired university professor. My research, in which I am still actively engaged, deals with decision-making under deep uncertainty: how to make a decision, or design a project, or plan an operation when major relevant factors are unknown or highly uncertain. I developed a decision theory called info-gap theory that grapples with this challenge, and is applied around the world in many fields, including engineering design, economics, medicine, national security, biological conservation, and more.

Yakov's book list on making decisions when you don’t know what’s going on

Yakov Ben-Haim Why Yakov loves this book

War is the realm of uncertainty. Clausewitz sums this up by referring to the "fog of war".

Military commanders must confront this uncertainty, making far-reaching decisions when the fog of war obscures their understanding of the situation and the implications of their actions.

The book contains concise professional and historical biographies of 6 generals of the IDF, serving from early 1973 (prior to the Yom Kippur War) to 2013. The studies focus on decisions made – or not made – by these generals, the uncertainties that they confronted, and the military, political and social constraints they faced.

An interesting aspect is the personal and individualistic nature of the decision-making process. While military activity has a long history and much theory, it is more of an art than a science. The art of war, and of preventing war, is very personal, and it differs from one general to another. Some generals…

By Meir Finkel ,

Why should I read it?

1 author picked Studies in Generalship as one of their favorite books, and they share why you should read it.

What is this book about?

The commander, or chief of staff, of the Israel Defense Forces (IDF) is a prominent public figure in Israel. His decisions, advice, and persona exert direct influence on force design and military strategy, and indirectly impact social, economic, and foreign affairs. This first-ever in-depth comparative study on the role and performance of the IDF chiefs of staff throughout modern Israel's history offers lessons for practitioners and students of strategy, military history, and leadership everywhere.


Book cover of Hannibal: Rome's Greatest Enemy

Yakov Ben-Haim Author Of The Dilemmas of Wonderland: Decisions in the Age of Innovation

From my list on making decisions when you don’t know what’s going on.

Why am I passionate about this?

I am a retired university professor. My research, in which I am still actively engaged, deals with decision-making under deep uncertainty: how to make a decision, or design a project, or plan an operation when major relevant factors are unknown or highly uncertain. I developed a decision theory called info-gap theory that grapples with this challenge, and is applied around the world in many fields, including engineering design, economics, medicine, national security, biological conservation, and more.

Yakov's book list on making decisions when you don’t know what’s going on

Yakov Ben-Haim Why Yakov loves this book

This is a very readable account of Hannibal and his exploits, though it’s perhaps a somewhat idealized, romantic, and heroic portrayal of the man. Nonetheless it’s a great read.

The book follows Hannibal’s many military exploits in Carthage, Sicily, Spain, and many more, up to Cannae, Rome, and his ultimate fall from power and exile.

One sees the continual tension between three factors: Hannibal’s military genius in making military decisions despite deep uncertainty about his own capabilities and about the adversary's intentions, the military genius of his opponents, and the ruthless hand of uncertainty in human history. Hannibal’s life illustrates all three factors.

By Philip Freeman ,

Why should I read it?

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

What is this book about?

Telling the story of a man who stood against the overwhelming power of the mighty Roman empire, Hannibal is the biography of a man who, against all odds, dared to change the course of history.

Over two thousand years ago one of the greatest military leaders in history almost destroyed Rome. Hannibal, a daring African general from the city of Carthage, led an army of warriors and battle elephants over the snowy Alps to invade the very heart of Rome's growing empire. But what kind of person would dare to face the most relentless imperial power of the ancient world?…


If you love Yuval Noah Harari...

Ad

Book cover of The Guardian of the Palace

The Guardian of the Palace by Steven J. Morris,

The Guardian of the Palace is the first novel in a modern fantasy series set in a New York City where magic is real—but hidden, suppressed, and dangerous when exposed.

When an ancient magic begins to leak into the world, a small group of unlikely allies is forced to act…

Book cover of The Pursuit of Power: Technology, Armed Force, and Society since A.D. 1000

Yakov Ben-Haim Author Of The Dilemmas of Wonderland: Decisions in the Age of Innovation

From my list on making decisions when you don’t know what’s going on.

Why am I passionate about this?

I am a retired university professor. My research, in which I am still actively engaged, deals with decision-making under deep uncertainty: how to make a decision, or design a project, or plan an operation when major relevant factors are unknown or highly uncertain. I developed a decision theory called info-gap theory that grapples with this challenge, and is applied around the world in many fields, including engineering design, economics, medicine, national security, biological conservation, and more.

Yakov's book list on making decisions when you don’t know what’s going on

Yakov Ben-Haim Why Yakov loves this book

The author presents a reasoned rational explanation of historical events: Agents act rationally from self-interest. History makes sense.

As I read the book, I was challenged to ask: how rational is human behavior? What does rationality mean in a world that we hardly understand because it is fraught with uncertainty?

Uncertainty and surprise are important in history: What will be the next revolutionary invention? Who will be the next charismatic leader? What new ideology will sweep away conventions? Does history really make sense? Can we really make rational decisions when we face deep uncertainty about the world?

By William H. McNeill ,

Why should I read it?

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

What is this book about?

In this magnificent synthesis of military, technological, and social history, William H. McNeill explores a whole millennium of human upheaval and traces the path by which we have arrived at the frightening dilemmas that now confront us. McNeill moves with equal mastery from the crossbow-banned by the Church in 1139 as too lethal for Christians to use against one another-to the nuclear missile, from the sociological consequences of drill in the seventeenth century to the emergence of the military-industrial complex in the twentieth. His central argument is that a commercial transformation of world society in the eleventh century caused military…


Book cover of The Shortcut: Why Intelligent Machines Do Not Think Like Us

Simon J.D. Prince Author Of Understanding Deep Learning

From my list on machine learning and deep neural networks.

Why am I passionate about this?

I started my career in neuroscience. I wanted to understand brains. That is still proving difficult, and somewhere along the way, I realized my real motivation was to build things, and I wound up working in AI. I love the elegance of mathematical models of the world. Even the simplest machine learning model has complex implications, and exploring them is a joy.

Simon's book list on machine learning and deep neural networks

Simon J.D. Prince Why Simon loves this book

This is a popular science book, so a little different from the others on this list. It is a beautifully written book that is accessible to people who don’t know much about AI but is simultaneously thought-provoking for experts.

It contains probably the best discussion of "intelligence" that I've read, interesting insights into how Google and other tech giants came to develop their machine learning strategy, and a fascinating chapter that views recommendation engines and their users as parts of a single intelligent organism. It's concise and easy to read.

I've read many popular AI books, which are highly variable in quality, and this criminally underappreciated work is the best by miles. 

By Nello Cristianini ,

Why should I read it?

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

What is this book about?

- The author is one of the most influential AI reseachers of recent decades.

- Written in an accessible language, the book provides a probing account of AI today and proposes a new narrative to connect and make sense of events that happened in the recent tumultuous past and enable us to think soberly about the road ahead.

- The book is divided into ten carefully crafted and easily-digestible chapters, each grapples with an important question for AI, ranging from the scientific concepts that underpin the technology to wider implications for society, using real examples wherever possible.


Book cover of The Long Shadow: The Great War and the Twentieth Century

Benjamin Carter Hett Author Of The Death of Democracy: Hitler's Rise to Power and the Downfall of the Weimar Republic

From my list on the legacy of the First World War.

Why am I passionate about this?

I was a law school graduate heading for my first job when, unable to think of anything better to do with my last afternoon in London, I wandered through the First World War galleries of the Imperial War Museum. I was hypnotized by a slide show of Great War propaganda posters, stunned by their clever viciousness in getting men to volunteer and wives and girlfriends to pressure them. Increasingly fascinated, I started reading about the war and its aftermath. After several years of this, I quit my job at a law firm and went back to school to become a professor. And here I am.

Benjamin's book list on the legacy of the First World War

Benjamin Carter Hett Why Benjamin loves this book

David Reynolds is simply one of the smartest and most original historians operating today. Do we imagine that no one thought much about the poems of Wilfred Owen until the 1960s? Do we think about how important the fiftieth anniversary of the Somme was for the politics of Ireland? This book is packed full of perceptive and original insights about the Great War’s very long legacy.

By David Reynolds ,

Why should I read it?

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

What is this book about?

One of the most violent conflicts in the history of civilization, World War I has been strangely forgotten in American culture. It has become a ghostly war fought in a haze of memory, often seen merely as a distant preamble to World War II. In The Long Shadow critically acclaimed historian David Reynolds seeks to broaden our vision by assessing the impact of the Great War across the twentieth century. He shows how events in that turbulent century-particularly World War II, the Cold War, and the collapse of Communism-shaped and reshaped attitudes to 1914-18.

By exploring big themes such as…


If you love 21 Lessons for the 21st Century...

Ad

Book cover of Oaky With a Hint of Murder

Oaky With a Hint of Murder by Dawn Brotherton,

Aury and Scott travel to the Finger Lakes in New York’s wine country to get to the bottom of the mysterious happenings at the Songscape Winery. Disturbed furniture and curious noises are one thing, but when a customer winds up dead, it’s time to dig into the details and see…

Book cover of The Future of Nostalgia

Judith Glatzer Wechsler Author Of The Memoirs of Nahum N. Glatzer

From my list on anthology that bring sources to light.

Why am I passionate about this?

I am an art historian and was professor of art history at MIT, Tufts, Harvard, and elsewhere. As an undergraduate I studied Jewish history and philosophy and subsequently was assistant editor at Schocken Books focusing on art history and history of ideas. My graduate work was in art history, first in medieval manuscripts and then 19th century French art. I’ve written four books, edited four others, and made 30 documentaries, mostly on art. The French government knighted me “Chevalier dans l’ordre des arts et des lettres.”

Judith's book list on anthology that bring sources to light

Judith Glatzer Wechsler Why Judith loves this book

I met Svetlana in the last two years of her life and was deeply impressed by her brilliance in literature and the history of ideas and cultures. She died, tragically, in her mid 50s cutting short her extraordinary career, from childhood and youth in Soviet Russia to her stellar career as a Harvard professor of comparative literature. Of her seven books, this highly original study of nostalgia has been particularly important.

A ground breaking study about longing in its positive and negative forms, focusing on post-communist cities such as St. Petersburg, Moscow and Berlin, and writers Nabokov, Brodsky, and Kabakov. Erudite, brilliant, and witty, this is a great cross-genre study of our modern condition.

By Svetlana Boym ,

Why should I read it?

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

What is this book about?

Combining personal memoir, philosophical essay, and historical analysis, Svetlana Boym explores the spaces of collective nostalgia that connect national biography and personal self-fashioning in the twenty-first century. She guides us through the ruins and construction sites of post-communist cities-St. Petersburg, Moscow, Berlin, and Prague-and the imagined homelands of exiles-Benjamin, Nabokov, Mandelstahm, and Brodsky. From Jurassic Park to the Totalitarian Sculpture Garden, Boym unravels the threads of this global epidemic of longing and its antidotes.


Book cover of The Rise and Triumph of the Modern Self: Cultural Amnesia, Expressive Individualism, and the Road to Sexual Revolution

Adam Ellwanger Author Of Metanoia: Rhetoric, Authenticity, and the Transformation of the Self

From my list on why looking for your ‘true self’ is pointless.

Why am I passionate about this?

I'm a professor of rhetoric at the University of Houston – Downtown. In addition to my academic research, I write political and cultural commentary for a variety of right-of-center online publications. Much of my own work focuses on how individuals come to be persuaded about who they are. I argue that much of the frustration people feel when searching for their authentic identity is due to the fact that the existence of the hidden ‘true self’ is an illusion. The quest for authenticity is never complete. The good news, though, is that you can put an end to the suffering… only if you’re willing to give up the fevered pursuit of the “true self.”

Adam's book list on why looking for your ‘true self’ is pointless

Adam Ellwanger Why Adam loves this book

While Trueman reviews some of the ideas covered by other thinkers on this list, his new book is notable because it focuses on how personal sexual identity (sexual orientation, gender, desire, etc.) came to be the most important site for the expression of individualism. His analysis underscores the threat that a radically subjectivized sexual ethic posed to longstanding social norms and cultural traditions. This one also includes a gushing foreword by best-selling author Rod Dreher of The American Conservative magazine.

By Carl R. Trueman ,

Why should I read it?

1 author picked The Rise and Triumph of the Modern Self as one of their favorite books, and they share why you should read it.

What is this book about?

Carl Trueman traces the historical roots of many hot-button issues such as transgenderism and homosexuality, offering thoughtful biblical analysis as he uncovers the profound impact of the sexual revolution on modern human identity.


Book cover of Civilization Critical: Energy, Food, Nature, and the Future

Sandy Graham Author Of You Speak For Me Now

From my list on to influence human society.

Why am I passionate about this?

Over the past decade, I’ve become very concerned with the direction authoritarianism is taking human society. It’s a global problem that now infects America, leaving us with a partisan divide we may not be able to bridge. My recommended books helped me understand the situation and how one might speak out against this negative force effectively. Convinced that bombarding readers with facts alone is useless, I chose to provide a novel that is interesting and captivates readers. My goal is to entice readers to press on to the end regardless of their political persuasion, in hopes that along the way some thought will be devoted to the issues raised.

Sandy's book list on to influence human society

Sandy Graham Why Sandy loves this book

Despite the Covid pandemic, the two biggest threats to human society are political strife and degradation of its food supply through climate change and population explosion. Darren Qualman provides an easily understood discussion of the latter. He starts with the simple closed-loop plant/animal cycle powered by the sun’s energy, which existed up until about 300 years ago. Then, explains how the discovery of coal and oil, invention of the tractor, and development of a process to convert oil into fertilizer changed all that.

As a teenager, I was taught that the population explosion would cause mass starvation in the near future. Darren explains how force-feeding plants and domesticated animals, now using over 400 million tons of oil-based fertilizer each year, forestalled that. But combined with oil, gas, and coal burned today, human society is living with a time-bomb unless we learn to live with energy now available from the sun.

By Darrin Qualman ,

Why should I read it?

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

What is this book about?

The modern world is wondrous. Its factories produce ten thousand cars every hour and ten trillion transistors every second. We carry supercomputers in our pockets, and nearly a million people are in the air at any time. In Civilization Critical, Darrin Qualman takes readers on a tour of the wonders of the 21st century.
But the great strength of our modern word is also its great weakness. Our immense powers to turn resources and nature into products and waste imperil our future. And plans to double and redouble the size of the global economy veto sustainability.
So, is our civilization…


If you love Yuval Noah Harari...

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 The Myth of Normal: Trauma, Illness, and Healing in a Toxic Culture

Immaculata De Vivo Author Of The Biology of Kindness: Six Daily Choices for Health, Well-Being, and Longevity

From my list on the science behind our current behavior and health.

Why am I passionate about this?

I’m reading books that are centered on science and behavior and health. After decades of research on the interplay between genes and the environment, I had a strong foothold on the genetic part, but I needed to understand the environment part to make any sense of it all. This research has broadened my horizons exponentially. We know that genes are immutable, for the most part… but parts of the genome are mutable—and we can shape our lifestyle/behavior to improve our health. 

Immaculata's book list on the science behind our current behavior and health

Immaculata De Vivo Why Immaculata loves this book

Maté asks why chronic illness and general poor health are on the rise in Western countries that pride themselves on their healthcare systems.

Nearly 70 percent of Americans are on at least one prescription drug; more than half take two. In Canada, one person in five has high blood pressure, while in Europe, hypertension is diagnosed in more than 30 percent of the population. And adolescent mental illness is on the rise everywhere.

Despite medical knowledge and technological sophistication, Western medicine often fails to treat the whole person by not considering how contemporary culture stresses the body, burdens the immune system, and undermines our sense of emotional balance.

Maté dispels common myths about what makes us sick, connecting the dots between the maladies of individuals and the progressive malaise of society, and offers some suggestions for healing. 

By Gabor Maté , Daniel Maté ,

Why should I read it?

6 authors picked The Myth of Normal as one of their favorite books, and they share why you should read it.

What is this book about?

'It all starts with waking up... to what our bodies are expressing and our minds are suppressing'

Western countries invest billions in healthcare, yet mental illness and chronic diseases are on a seemingly unstoppable rise. Nearly 70% of Americans are now on prescription drugs. So what is 'normal' when it comes to health?

Over four decades of clinical experience, renowned physician and addiction expert Dr Gabor Mate has seen how health systems neglect the role that trauma exerts on our bodies and our minds. Medicine often fails to treat the whole person, ignoring how today's culture stresses our bodies, burdens…


Book cover of A Question of Standing: The History of the CIA
Book cover of Studies in Generalship: Lessons from the Chiefs of Staff of the Israel Defense Forces
Book cover of Hannibal: Rome's Greatest Enemy

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?