Here are 89 books that Into the Gray Zone fans have personally recommended if you like Into the Gray Zone. Shepherd is a community of 12,000+ authors and super readers sharing their favorite books with the world.

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Book cover of No One Will Miss Her

Arthur Herbert Author Of The Bones of Amoret

From my list on endings that make you go, “Whoooooaaaa”.

Why am I passionate about this?

I was born and raised in a small town in Texas, where I worked on offshore oil rigs as a bartender, a landscaper at a trailer park, and a social worker before attending medical school. I’ve worked as a trauma and burn surgeon for nineteen years. Living an exciting life has made me a better writer (like Hemingway said, “To write about life, first you must live it”), but it has little to do with my passion for mystery/suspense. I read this genre for the best reason, presumably the same as yours: I’m just a huge fan. I hope you enjoy these books as much as I did!

Arthur's book list on endings that make you go, “Whoooooaaaa”

Arthur Herbert Why Arthur loves this book

I’m not only a mystery/suspense writer but also a fan of the genre, as I read or listen to about forty whodunnits a year, just under one a week. I tend to read these books with one eye toward the superficial story, yes, but I also study them from a technical standpoint, saying to myself, “Oh, I see what the author did there,” “Man, that was a nice way to frame that conflict,” or, “What the hell? I think the author wrote that chapter by getting drunk and taping crayons to their feet.” The point I’m trying to make is that the plot devices and metaphors tend to blur together after a while. 

But this book? Man, it stood out. I mean, Kat Rosenfield had me hook, line, and sinkers with the book’s opening line, “My name is Lizzie Ouellette, and if you’re reading this, I’m already dead.” It's…

By Kat Rosenfield ,

Why should I read it?

2 authors picked No One Will Miss Her as one of their favorite books, and they share why you should read it.

What is this book about?


"Blade-sharp, whip-smart, and genuinely original - a thriller to refresh your faith in the genre, your belief that a story can still outpace and outsmart you."- A. J. Finn, #1 New York Times bestselling author of The Woman in The Window

"Clever and surprising...The superb character-driven plot delivers an astonishing, believable jolt."-Publishers Weekly (starred review)

"Deserves two big thumbs up. Readers will be gripped by this astonishing story in which one gasp-inducing twist follows on the heels of another. A unique page-turner that just begs to be turned into a movie." -Booklist (starred review)

A smart, witty, crackling novel of…


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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 After Innocence

Kathryn C. Kelly Author Of Savage Suit

From my list on billionaire romances on my keeper shelf.

Why am I passionate about this?

I’ve been reading romance since I was a teenager and writing them just as long. I have given workshops and panels, written a chapter on romance novels in a Kathryn Falk book, and was once the VP of SOLA. I have read thousands of books but few are memorable enough to become my favorites.

Kathryn's book list on billionaire romances on my keeper shelf

Kathryn C. Kelly Why Kathryn loves this book

Edward DeLanza and Sofie O’Neil are star-crossed from the moment they meet in 1901 Newport Beach. He’s older, wealthy, and jaded. She’s young, wealthy, and idealistic.

Edward offers her the protection and concern she has lacked her entire life. It was powerful to see his change and how she became the most important person in the world to him. However, at the heart of After Innocence is Sofie’s coming-of-age. She learns to stand on her own two feet and rely on herself.

The infatuation she has for Edward turns into mature love as she comes into her own. After Innocence remains in my top 10 all-time favorite romances.

By Brenda Joyce ,

Why should I read it?

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

What is this book about?

A dreamweaver spinning spells that entice and enchant, a masterful creator of unforgettable characters and incomparable romance , bestselling author Brenda Joyce works magic -- From her award-winning American saga of the lusty remarkable Bragg family to the spellbinding medieval passion ofPromise of the Rose

Estranged from society, wealthy and beautiful artist Sofie O'Neil finds solace in her private world, She longs just once to taste a forbidden love -- to follow the dangerous diamond muggler Edward Delanza to paradise. But Edward wants far more from the innocent young heiress than a brief and passing encounter. For he is determined…


Book cover of Billionaires' Row: Tycoons, High Rollers, and the Epic Race to Build the World's Most Exclusive Skyscrapers

Jason M. Barr Author Of Cities in the Sky: The Quest to Build the World's Tallest Skyscrapers

From my list on real estate titans built New York skyline.

Why am I passionate about this?

As an economics professor, I’ve spent the past twenty years researching why cities build upward. Though I mostly look at cities through the lens of statistics and data, every building has a personal and dramatic story that exists behind the numbers. And no matter where you go in the world, great cities with their towering skyscrapers all owe a debt to New York—every city wants its own version of the Empire State Building to signal its economic might. New York is the world’s metropolis. As the (now cliché) song line goes, “If I can make there, I’ll make it anywhere,” is a true today as a century ago.

Jason's book list on real estate titans built New York skyline

Jason M. Barr Why Jason loves this book

If you stroll through Central Park, as I frequently do, you can’t help but notice the string of supertall, superslim towers lording over Central Park South. Many New Yorkers decry them as creating excessive shadows and driving gentrification. However, viewing them from the park, you can see how they naturally fit into the Manhattan skyline—the skyline that created the world’s greatest city.

Katherine Clarke’s book chronicles the developers who brought forth these ultraluxury towers. It dramatically highlights the game of 3D chess these New York titans must play to realize their skyscraper dreams. Some win, and some lose—but that’s the striver’s tale in Gotham.

By Katherine Clarke ,

Why should I read it?

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

What is this book about?

A “thrilling” (Financial Times) fly-on-the-wall account of the ferocious ambition, greed, and one-upmanship behind the most expensive real estate in the world: the new Manhattan megatowers known as Billionaires’ Row—from a staff reporter at The Wall Street Journal

“Deeply informative, delightfully entertaining, and addictively readable.”—Diana B. Henriques, bestselling author of The Wizard of Lies

A CEO Magazine Best Book of the Year • Longlisted for the Financial Times and Schroders Business Book of the Year Award

To look south and skyward from Central Park these days is to gaze upon a physical manifestation of tens of billions of dollars in…


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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 King of Wrath

Delaney Diamond Author Of Ethan

From my list on swoon-worthy heroes in romance.

Why am I passionate about this?

I’ve been a published romance author since 2010, but even before I published my first romance novel, I was an avid reader of the genre. In fact, I started at the very young age of eleven, checking out romance novels from my local public library. Over the years, I’ve read hundreds of books and found the ones that I enjoy the most have the most intriguing heroes who fall hard for the heroine. 

Delaney's book list on swoon-worthy heroes in romance

Delaney Diamond Why Delaney loves this book

This book has everything I love about the billionaire trope—a filthy rich alpha male used to controlling every aspect of his life falling hard for one woman. 

Dante and Vivian were forced into a marriage of convenience because Vivian’s father blackmailed Dante—unbeknownst to her. In the beginning, Dante is rude and unkind, but as the story progresses, Vivian gets under his skin—in a good way.

I got a kick out of watching him slowly fall in love with her and the way that love manifested in acts of kindness—big and small. Dante softened toward Vivian and became willing to do anything to make her happy. His transformation from a hateful brute to a loving future spouse was not only enjoyable to watch, there were times when I actually sighed because Vivian was a lucky chica indeed. 

By Ana Huang ,

Why should I read it?

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

What is this book about?

*A NEW YORK TIMES BESTSELLER*

An arranged marriage billionaire romance standalone from New York Times bestselling author and BookTok sensation Ana Huang.

She was my North Star, the brightest jewel in my sky.

Ruthless. Meticulous. Arrogant.

Billionaire CEO Dante Russo thrives on control, both personally and professionally.

He never planned to marry…until the threat of blackmail forces him into an engagement with a woman he barely knows.

Vivian Lau, jewelry heiress and daughter of his newest enemy. The wife he never wanted, and the weakness he never saw coming.

It doesn't matter how beautiful or charming she is. Dante will…


Book cover of No Ordinary Billionaire

Krista Lakes Author Of Saltwater Kisses

From my list on for a romantic beach read.

Why am I passionate about this?

I love writing my steamy, happily ever after romance novels. Billionaires are my Prince Charmings and they have a lot to offer the heroines I write. However, none of my heroines are weak. They are strong and they love the billionaires for who they are, not what they offer. I want a world full of romance, steam, and happily ever afters, so that’s what I love to write. My books are perfect for a relaxing day on the beach that will leave you feeling good.

Krista's book list on for a romantic beach read

Krista Lakes Why Krista loves this book

JS Scott writes the best billionaires. Every time she releases a new book or series, I gobble them up. This series is no different.

First, Dante is a tortured romance hero that is easy to love. His guilt over the death of his partner and his injury make me want to hug him close – which is exactly what Sarah Baxter wants to do! Except she can’t because she’s his doctor and she lives by her ethics. I love the connection the two of them have and how they have to help one another in their love. This book is sizzling and steamy with romance and intrigue to keep the pages turning!

By J.S. Scott ,

Why should I read it?

1 author picked No Ordinary Billionaire as one of their favorite books, and they share why you should read it.

What is this book about?

From Wall Street Journal bestselling author J. S. Scott.

Dante Sinclair never cared about his family's money. All the young billionaire ever wanted was to be a cop; and now that he's a homicide detective in Los Angeles, he's a damn good one. But when he is injured and loses his partner in the line of duty, he returns to his vacation home in Amesport, Maine, to recover.

Sarah Baxter, a brilliant young doctor still struggling with her stifled upbringing, has recently moved from Chicago to sleepy Amesport to escape her past, hoping to find peace. When Sarah is assigned…


Book cover of Billionaire Wilderness: The Ultra-Wealthy and the Remaking of the American West

Kimberly Kay Hoang Author Of Spiderweb Capitalism: How Global Elites Exploit Frontier Markets

From my list on global financial elites.

Why am I passionate about this?

I am a professor of sociology at the University of Chicago, and I am interested in global capitalism, financial elites, and all aspects of how people broker capital deals. I am a scholar of anti-heroes who studies all of the ways that people play in the gray. My first book, Dealing in Desire, is an ethnography where I embedded myself in several different hostess bars to study the relationship between sex work and financial deal-making. I grew up in California but have lived most of my adult life in Ho Chi Minh City, Houston, Boston, and Chicago. 

Kimberly's book list on global financial elites

Kimberly Kay Hoang Why Kimberly loves this book

I loved this book because it takes you inside the exclusive world of the ultra-wealthy within the United States and shows how the richest are exploiting the natural environment in Teton County, Wyoming, to solve personal existential crises.

The author managed to get incredible access to prominent tech CEOs, Wall Street financiers, and other ultra-high-net-worth individuals who have moved to a place where they can profit from their environmental philanthropy while also contributing to ever-widening economic inequality by privatizing public goods. I thought this book provided a fair yet fascinating insight into the contradictions of philanthropy, which allow the rich to donate in ways that absolve themselves from the guilt of the inequality that they contribute to. 

By Justin Farrell ,

Why should I read it?

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

What is this book about?

A revealing look at the intersection of wealth, philanthropy, and conservation

Billionaire Wilderness takes you inside the exclusive world of the ultra-wealthy, showing how today's richest people are using the natural environment to solve the existential dilemmas they face. Justin Farrell spent five years in Teton County, Wyoming, the richest county in the United States, and a community where income inequality is the worst in the nation. He conducted hundreds of in-depth interviews, gaining unprecedented access to tech CEOs, Wall Street financiers, and other prominent figures in business and politics. He also talked with the rural poor who live among…


Book cover of Tapping the Billionaire

M. Malone Author Of Beg Me (Mess with Me)

From my list on romantic comedies to make you LOL in public.

Why am I passionate about this?

Hi! I’m M. Malone, a NYT, USA Today Bestseller, and RITA award winner. My ultimate goal in life is to make readers laugh in the most inappropriate places possible. When I moved away from home after college, it was difficult to make friends in a brand new city. Romantic comedies provided the joy I needed to go out into the real world and thrive. Now I get to make up stories that make other people laugh and in some cases pee their pants just a little (hey, I’m not judging).

M.'s book list on romantic comedies to make you LOL in public

M. Malone Why M. loves this book

Billionaire books are all the rage. Who doesn’t love a bit of fantasy, right? But this book takes it to an unexpected place when a woman who works for a dating app unknowingly matches with the boss of the whole company. It’s an unusual twist with the characters falling in love online and in person. Between copy room dance routines and cases of mistaken identity, this book will have you laughing until you cry. 

By Max Monroe ,

Why should I read it?

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

What is this book about?

A secret duo of romance authors team up under the pseudonym Max Monroe to bring you a sexy, laugh-out-loud new series. Are you ready to meet the Billionaire Bad Boys? Blind dates? Online dating profiles? Been there, done that. Georgia Cummings has zero luck with dating, and the era of the internet is not her friend. No matter how fast she runs, how many corners she turns, she can’t find her way out of this weird, alternate universe where men think dick pics are a replacement for small talk and getting to know a girl. One more crotch selfie and…


Book cover of Deal with the Devil

Rose Thorgaard Author Of Treasured

From my list on action packed romance makes you feel larger than life.

Why am I passionate about this?

From the first time I snagged a romance book off my mother's shelf as a teenager, I've always been a hopeless romantic. I'm fascinated by love stories that feel like real life, entwined with the good, bad, and sometimes ugly. This is why I enjoy exploring the duality of life and love in my own novels as a romantic suspense author.

Rose's book list on action packed romance makes you feel larger than life

Rose Thorgaard Why Rose loves this book

This book made me angry with the main characters while wishing them the best. They're two sides of the same coin, and I love seeing the familiarity and deep bond form throughout the story.

Watching the two main characters slowly fall for each other and eventually fight for their love was satisfying.

By Meghan March ,

Why should I read it?

1 author picked Deal with the Devil as one of their favorite books, and they share why you should read it.

What is this book about?

“You can put that man in a suit, but he'll never be tame." One look at Jericho Forge and I knew the rumors were true. He was a predator, and he had set his sights on me.I knew better than to bet more than I could afford to lose that night. I knew better than to bet myself. But desperation leads to bad decisions, and I thought there was no way I could lose.I was wrong. Now I have no choice but to make a deal with the devil.


Book cover of The Fine Print

Stella Holt Author Of Battle of Hearts

From my list on romance with siblings, strong women, & sweet heroes.

Why am I passionate about this?

I've been reading romance since I was a teenager; historical, modern, fantasy, you name it, I devoured it. Give me all the books with epic love stories, will they or won’t they, and happily ever afters. Although I didn’t tell anyone besides my mom about my writing for years, I can’t remember a time when I wasn't crafting my own love stories. In my books, I like to keep my readers guessing and challenge assumptions about people and what love can accomplish. The best romance stories include heartbreak and misunderstandings along the way, but that makes the endings that much sweeter. Happy Reading XO

Stella's book list on romance with siblings, strong women, & sweet heroes

Stella Holt Why Stella loves this book

Who doesn’t love a grumpy sunshine, workplace romance? I know I love it.

Give me the drama, awkward scenes, and that moment when the sunshine character outsmarts the Grump and cracks that hardshell to reveal they are also capable of sunshine. The chemistry between these two just jumps off the page for me. I know you’re going to love the angst. 

By Lauren Asher ,

Why should I read it?

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

What is this book about?

Rowan
I’m in the business of creating fairy tales.
Theme parks. Production companies. Five-star hotels.
Everything could be all mine if I renovated Dreamland.
My initial idea of hiring Zahra was good in theory, but then I kissed her.
Things spiraled out of control once I texted her using an alias.
By the time I realized where I went wrong, it was too late.
People like me don’t get happy endings.
Not when we’re destined to ruin them.

Zahra
After submitting a drunk proposal criticizing Dreamland’s most expensive ride, I should have been fired.
Instead, Rowan Kane offered me a…


Book cover of The Testament

D. Marshall Craig, M.D. Author Of Cut to the Chase

From my list on thrillers twisted plots surprise endings.

Why am I passionate about this?

I have always loved reading fiction novels with a fast-paced plot and an unexpected ending that surprises me. In my own Dr. Kyle Chandler Thriller Series, I try to use this same thought-provoking pattern that also includes quick dialogue with an underlying sexual tension between the male and female protagonists to keep the readers’ interest. Using this, I feel I am conveying my passion for the characters and plot to the reader. I believe that this theme of fast-paced, twisting plots matched with surprise endings is shown with clarity in all five of the books I have recommended in this list.

D.'s book list on thrillers twisted plots surprise endings

D. Marshall Craig, M.D. Why D. loves this book

While many of John Grisham’s novels are legal-based courtroom thrillers, this is not. As a result, I personally think this is one of his most interesting thrillers.

With a cadre of selfish family members circling the waters after the suicide death of their eccentric patriarch billionaire, the plot shifts to the wilds of the primitive Amazon rainforest as a recovering alcoholic attorney tries to track down the real heir to the vast family fortune.

I loved the vivid description of the water-filled jungle that made you feel right in the middle of the journey. His intense description of the protagonist fighting to overcome his lurking addiction while on his mission to make things right made you want to keep turning the pages until you reached the startling ending.

By John Grisham ,

Why should I read it?

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

What is this book about?

Troy Phelen is one of the richest men in the United States, and he's looking for a way to die.

He might just have found it.

Nate O'Riley is a high-powered Washington litigator who's lived hard and fast for too long. Emerging from his fourth stay in rehab, he knows returning to the real world is going to be murder.

Meanwhile Troy's estranged daughter walked away from the modern world and devoted her life to God, moving to the isolated deep jungles of Brazil.

When Troy dies and leaves a shocking will behind him, three lives collide with vast repercussions.…


Book cover of No One Will Miss Her
Book cover of After Innocence
Book cover of Billionaires' Row: Tycoons, High Rollers, and the Epic Race to Build the World's Most Exclusive Skyscrapers

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Interested in billionaires, kidnapping, and intelligence officers?

Billionaires 52 books
Kidnapping 123 books