Thriller

Guardians of the Holy Grail Thriller Series

Guardians of the Holy Grail (Guardians of the Holy Grail Book 1)

Guardians of the Holy Grail (Guardians of the Holy Grail Book 1) FREE by Preston William Child: Beneath the Temple Mount, archaeologist Dr. Laura Stevens uncovers ancient Templar documents pointing to the Holy Grail, an artifact of unimaginable power. But the NSA, the Vatican, and a ruthless Army unit are closing in. From Africa to England, Laura must protect the Grail from those who would abuse it. The true Guardians are watching.

This book is Free on April 3, 2026

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Digital Dilemmas, Troubled Siblings, and Hidden Motives: Free Mystery / Thriller eBooks

Lattes and Larceny at Birch Haven (Glamping & Gunner Mystery Series Book 1)

Lattes and Larceny at Birch Haven (Glamping & Gunner Mystery Series Book 1) FREE by Rachel Darrishaw: Luxury yurts and foliage turn into a crime scene when travel writer Danell White and her pug, Shotgun, find a dead barista at Birch Haven. The sheriff calls it an accident, but Danell smells a cover-up. Behind the artisan lattes and cozy campfires, someone is hiding a killer secret. Can she unmask the culprit before the trail goes cold?

This book is Free on April 3, 2026

You Did This (Claire Wolfe Thrillers Book 1)

You Did This (Claire Wolfe Thrillers Book 1) FREE by Jamie Millen: “A consistently exciting debut” (Kirkus Reviews): Only Claire sees the sinister nature behind the sweet face of her sister, Tina. But Tina is brutally murdered at 14, and 12 years later, as more teenage girls turn up dead, investigators consider the possibility of a serial killer — leaving Claire, now a detective, at the top of their suspect list…

This book is Free on April 3, 2026

Mash Up (Detective Qigiq Book 1)

Mash Up (Detective Qigiq Book 1) FREE by Joe Klingler: Disturbed by the death of a suspect in a recent case, Qigiq— Fairbanks detective and master knifeman—heads south to partner with action-loving Kandy Dreeson of the SFPD. Their first case immerses them in the most complex cyber-crime of the decade when missing college musician appears on YouTube.

This book is Free on April 3, 2026

The Halcyon Tower Fall (Mercer Files Book 1)

The Halcyon Tower Fall (Mercer Files Book 1) FREE by Studio Napi: When eight Halcyon Analytics executives step off a rooftop terrace in the middle of a corporate retreat, the city wants a simple explanation. Instead, it gets corrupted security footage, a deadlocked investigation, and one surviving witness whose memory refuses to hold still. Then the Halcyon tower case lands in Dr. Elias Mercer's lab.

This book is Free on April 3, 2026

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The Dr. Bryce Chapman Medical Thriller Series

Redemption (Dr. Bryce Chapman Medical Thrillers Book 1)

Redemption (Dr. Bryce Chapman Medical Thrillers Book 1) FREE by Brian Hartman: Murder victims make terrible ER patients. Just ask Bryce Chapman, the doctor who blew off a patient who was in the process of being murdered. What happened next puts his career, family, and ultimately his life in jeopardy. Follow Bryce as he pushes ethical boundaries to the point of breaking in order to secure redemption. Books 2-4 on sale for $2.99!

This book is Free on April 2, 2026

Other Books in the series

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High-Stakes Trials, Desert Secrets, and Daring Escapes: Free Mystery / Thriller eBooks

Death by the River (A Maggie Crow Mystery Book 1)

Death by the River (A Maggie Crow Mystery Book 1) FREE by Ginger Bloom: The cards warned him. Nobody listened. Three days later, he was at the bottom of the wharf. Maggie Crow just inherited a blue house on the St. Lawrence, a tarot deck, and a very opinionated dachshund named Merlin. She figured her biggest problem would be learning the cards. Then her first client turned up dead. The detective called it an accident.

This book is Free on April 2, 2026

Murder In the Desert (Jake Stewart Mysteries Book 1)

Murder In the Desert (Jake Stewart Mysteries Book 1) FREE by Mike Cassidy: First in a charming cozy mystery series! After losing his big-city job, reporter Jake Stewart drifts to a dusty Arizona town searching for a fresh start—then finds a body in the desert and a woman who swears she’s innocent. Hired by the local newspaper, Jake uncovers buried secrets, rumored treasure, and a killer set on keeping the truth hidden.

This book is Free on April 2, 2026

Death in the Valley

Death in the Valley FREE by James Hunt: The old world is gone. The EMP wiped it out in less than a second. Law and order have been replaced by violence and chaos. Luke Marsh is forced to navigate this new normal while trying to keep his family alive, and as families vie for resources, it becomes clear that there isn’t enough to go around. The writing is on the wall, and it’s only a matter of time before the community tears itself apart.

This book is Free on April 2, 2026

The Lawyer (Michael Gresham Thrillers Book 1)

The Lawyer (Michael Gresham Thrillers Book 1) FREE by John Ellsworth: A JUDGE'S WIFE IS DEAD, AND THE PUBLIC IS DEMANDING BLOOD. A career-ending case lands on Michael Gresham’s desk, and he doesn’t flinch. With little left to lose, he follows the faint trace of corruption buried in a media storm. A sharp legal mind becomes a dangerous opponent, and suddenly it’s the justice establishment on trial.

This book is Free on April 2, 2026

The Sacred Vein (The Sacred Vein Series Book 1)

The Sacred Vein (The Sacred Vein Series Book 1) FREE by Brian Young: A sweeping adventure that moves from the pioneer trails of 1850s Utah to a desperate battle in the mountain wilderness. A story about the treasures we chase, the patterns we inherit, and the courage it takes to break free. It follows a university professor, his hacker adventure partner, and a non binary park ranger as they solve an ancient mystery.

This book is Free on April 2, 2026

Deadly Descent (Dex Dexter Adventure Thrillers Book 2)

Deadly Descent (Dex Dexter Adventure Thrillers Book 2) FREE by Douglas Stewart: Since destroying a corrupt Vegas casino, Dex has moved on but his enemies have not. The death threats keep coming. When his charity’s helicopter mysteriously crashes killing everyone, Dex has to fight to clear his reputation in Africa, the USA, and Europe. But where is he safe? The plot hurtles to a climax with enemies closing in from all sides.

This book is Free on April 2, 2026

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The Detective Rachel Storme Thriller Series

Justice for Jessica (Detective Rachel Storme Book 1)

Justice for Jessica (Detective Rachel Storme Book 1) FREE by Alretha Thomas: When Stacey’s glamorous best friend is murdered, she teams up with retiring detective Rachel Storme to uncover the truth. As suspects pile up—including Stacey’s own husband—their unlikely friendship is tested in a gripping hunt for justice where loyalty and truth collide.

This book is Free on April 1, 2026

Other Books in the series

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Murder Plots, Stolen Artifacts, and Explosive Schemes: Free Mystery / Thriller eBooks

Secrets at Saltwick

Secrets at Saltwick FREE by K.S. Van: Former detective Sam Blackwood arrives in Saltwick, Maine. A historian is dead. A powerful organization targets something ancient buried beneath the old library—connected to the Guardian network Sam belongs to. With her dog Moss and ghost Ezra, she has 48 hours. Not just a cold case. A countdown. Book 3 of The Moonhaven Mysteries series.

This book is Free on April 1, 2026

Posse of Thieves (The Tinman Series Book 1)

Posse of Thieves (The Tinman Series Book 1) FREE by Marc J. Reilly: 35 years ago, the heist went off without a hitch, but the haul only amounted to some dumb baskets. Too bad Tinman and Peach didn’t know they were worth a million bucks a pop, or they wouldn’t have given them away. What’s a crook to do? Steal them again, that’s what. Bring the funny back into your life. Get this comedic gem from the Tinman Series.

This book is Free on April 1, 2026

Conception: Birth of The Phoenix Box Set

Conception: Birth of The Phoenix Box Set FREE by Ted Tayler: Two prequels. One origin. No escape. Before he was The Phoenix, Colin Bailey was a man betrayed by life and rebuilt by rage. Two electrifying novels chart his rise—and the detective who dares to chase him. When vengeance ignites, can justice survive the fire?

This book is Free on April 1, 2026

Flash Override (A Jon Smith Novel Book 3)

Flash Override (A Jon Smith Novel Book 3) FREE by Bob Asher: CIA Paramilitary Officer Jon Smith and his teammate, Angus, return to the USA to help Jon’s brother, Zack, rescue his wife and son from Chechen terrorists bent on revenge. The Chechens’ plan is much bigger. They plan to detonate a stolen nuclear warhead during the President’s political rally. It falls to Jon, Angus, and Zack to save the day.

This book is Free on April 1, 2026

Revenge (The Redemption Series Book 1)

Revenge (The Redemption Series Book 1) FREE by Henry Scott: Jake Bryant, a former Chicago PD detective, rushes home after his best friend is killed. Determined to find the murderer, he starts his own investigation into Tom's death. However, the case is complicated by a motorcycle gang, drugs, and Jake's feelings for Tom's widow.

This book is Free on April 1, 2026

Bad Day for Justice (Warren & Carmichael Legal Thrillers Book 2)

Bad Day for Justice (Warren & Carmichael Legal Thrillers Book 2) FREE by Charlotte Stuart & Don Stuart: Two families bound by a single tragedy—one loses a father to murder, the other sees theirs accused of the crime. A hijacked Navy jet. A priceless heirloom brooch. And a murder trial. Then, decades later, law partners Duncan Carmichael and Sydney Warren strive to find justice for both families. But is justice delayed still justice?

This book is Free on April 1, 2026

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The Poor Little Rich Kids Thriller Series

The Testimony of Some Poor Little Rich Kids (Poor Little Rich Kids Book 1)

The Testimony of Some Poor Little Rich Kids (Poor Little Rich Kids Book 1) FREE by Andrew Anzur Clement: A group of entitled twenty-somethings gets a lot more than they bargained for when they take in a Bulgarian street kid who begs for their help. They are forced to go on the run, unaware that they have embarked on an adventure that will lead them to discover the true worth of friendship and family... if they don't fall prey to the mafia, first.

This book is Free on March 31, 2026

Other Books in the series

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Small-Town Crimes, Parental Regrets, and Parisian Secrets: Free Mystery / Thriller eBooks

The Babbling Brook Naked Poker Club (Book 1)

The Babbling Brook Naked Poker Club (Book 1) FREE by Ann Warner: First book in a series with charm, wit, quirky characters, clever sleuthing, and thousands of 5-star reviews. A series that is a perfect fit for fans of Richard Osman’s Thursday Murder Club novels and for readers who enjoy mysteries where character relationships shine as brightly as the puzzles themselves.

This book is Free on March 31, 2026

Firefly

Firefly FREE by Hailey Stein: Ben’s routine shatters when a disappearance pulls him to Paris with a woman he doesn’t trust—but can’t resist. As secrets unravel in the City of Light, attraction and deception collide in a fast-paced, clean mystery with romance, twists, and a captivating Paris setting.

This book is Free on March 31, 2026

A Life for a Life (Appalachian Mountain Mysteries Book 1)

A Life for a Life (Appalachian Mountain Mysteries Book 1) FREE by Lynda McDaniel: Series starter! Crime reporter Della Kincaid escapes Washington DC for what she thought was a quiet mountain town. Then she finds the body. When the sheriff rules suicide, Della knows better—and her instinct to hunt for the truth puts her on the trail of a killer. "After reading the first book, I read all the others as quickly as possible." ~Ruth H

This book is Free on March 31, 2026

Twenty Acres

Twenty Acres FREE by Joey Wells: When the power dies without warning, Mel knows it isn’t just a storm. Cars stall. Phones go silent. The town goes dark. With her daughter at her side and panic spreading fast, she must turn her quiet homestead into a fortress before the world realizes it’s already fallen.

This book is Free on March 31, 2026

Very Bad Parents

Very Bad Parents FREE by Amy Meitz: In 1964, sixteen-year-old Joan Andersen survives the crudest form of savagery: a botched abortion. What follows is a series of painful complications, leaving her traumatized and emotionally scarred. Plagued with guilt and longing for redemption, Joan convinces herself that the baby she lost is still with her, an obsession bordering on delusion.

This book is Free on March 31, 2026

Parallax: What Happens When Machines Start Betting On War?

Parallax: What Happens When Machines Start Betting On War? FREE by scm7k: What happens when AI agents create a feedback loop between prediction and reality? Five people have five days to answer that question as an autonomous trading system drives markets, moves intelligence, and blurs the line between forecasting a war and causing one. The answer isn't a conspiracy. It's worse.

This book is Free on March 31, 2026

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Bold Frameworks, Enduring Wisdom, and Real-World Lessons: Free Nonfiction eBooks

Once Upon A Leader: Create Culture & Navigate Change With Vision, Integrity, Adaptability, & Influence

Once Upon A Leader: Create Culture & Navigate Change With Vision, Integrity, Adaptability, & Influence FREE by Sally M. Evans: Dreading Monday mornings? Working in a culture that’s lost its spark? Once Upon a Leader shows how timeless stories and the Leadership Compass turn theory into true human connection. Because people don’t change through information. They change through meaning. Open the book. Remember what real leadership was always meant to be.

This book is Free on March 31, 2026

The Triad: Truth, Will, and Compassion in the Age of Artificial Intelligence

The Triad: Truth, Will, and Compassion in the Age of Artificial Intelligence FREE by Jean-Sebastian Roy: AI is accelerating. Institutions are lagging. Humanity feels the strain. The Triad introduces a bold framework built on Truth, Will, and Compassion to help individuals and leaders navigate the age of artificial intelligence without fear or collapse. This is not sci-fi. It’s a survival architecture.

This book is Free on March 31, 2026

Daily Positive, Inspirational & Wisdom Thoughts for Pregnant and New Moms (Inspirational & Wisdom Thoughts Series Book 3)

Daily Positive, Inspirational & Wisdom Thoughts for Pregnant and New Moms (Inspirational & Wisdom Thoughts Series Book 3) FREE by Mytitude Books: 150+ Handpicked Powerful Quotes, Sayings, Proverbs and Wise Thoughts combined with practical application in real-life scenarios for Your Motherhood Journey. Plus 160+ Gratitude & Affirmations and 145+ actionable Tips.

This book is Free on March 31, 2026

The Ghosts of Rafah: An Undercover Counter-Terrorism Agent in the Heart of the Middle East Conflict

The Ghosts of Rafah: An Undercover Counter-Terrorism Agent in the Heart of the Middle East Conflict FREE by Tomer Tzaban: Tomer Tzaban, one of the IDF’s first undercover operators in Gaza, shares firsthand accounts of previously untold missions from the heart of the Israeli-Palestinian conflict, laying out mission after fast-paced mission in the unit’s hair-raising legacy.

This book is Free on March 31, 2026

WWII the Most Momentous ‘NO’ in Modern History: The World Changing Impact of Halifax’s Decline of the British Premiership in 1940

WWII the Most Momentous ‘NO’ in Modern History: The World Changing Impact of Halifax’s Decline of the British Premiership in 1940 FREE by Daniel Kalir: What if Lord Halifax had become British Prime Minister in 1940? This book explores how Britain’s early exit from WWII could have reshaped the world.

This book is Free on March 31, 2026

Climbing Your Career Tree: Life Lessons to Grow the Leader Within You

Climbing Your Career Tree: Life Lessons to Grow the Leader Within You FREE by David Purvis: What if the secret to career success isn't climbing higher — it's growing deeper? Climbing Your Career Tree gives you real-world lessons to build unshakeable roots, bold new branches, and a legacy that lasts. Start growing today.

This book is Free on March 31, 2026

How to Be Enough: Your Worth Isn’t Up for Negotiation

How to Be Enough: Your Worth Isn’t Up for Negotiation FREE by Remmy Henninger: You perform. You achieve. You deliver. And it still doesn't feel like enough. This book makes a different argument: enoughness isn't earned through performance. It's a baseline you build - then everything changes. Not affirmations. A framework.

This book is Free on March 31, 2026

Smart Thinking for Teens

Smart Thinking for Teens FREE by Daisy Bright: Think smarter, not harder. This practical guide shows teens how to break down arguments, spot weak logic, and evaluate information with confidence—no fluff—just clear, useful skills for school, debates, and everyday decisions.

This book is Free on March 31, 2026

Our Love is the Cure

Our Love is the Cure FREE by Matt Buonocore: Unlock the power of love and transform your life with Our Love is the Cure. This book of spiritual affirmations and poetry will guide you towards liberation from fear, allowing you to experience true spiritual growth. As you embrace the message of service, you will discover the beauty of the present moment and the oneness that connects us all.

This book is Free on March 31, 2026

Learn Spanish for Real in 60 Days

Learn Spanish for Real in 60 Days FREE by GlobalLang Academy: Learn Spanish for traveling with confidence in just 60 days. A simple, step-by-step method with real-life lessons and short stories to help you speak and understand everyday situations—no boring grammar, just practical Spanish from day one.

This book is Free on March 31, 2026

Parallax: What Happens When Machines Start Betting On War?

Parallax: What Happens When Machines Start Betting On War? FREE by scm7k: What happens when AI agents create a feedback loop between prediction and reality? Five people have five days to answer that question as an autonomous trading system drives markets, moves intelligence, and blurs the line between forecasting a war and causing one. The answer isn't a conspiracy. It's worse.

This book is Free on March 31, 2026

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Oceanfront Scandals, Buried Confessions, and Framed Detectives: Free Mystery / Thriller eBooks

Murder Al Dente (Nikki Hunter Mysteries Book 9)

Murder Al Dente (Nikki Hunter Mysteries Book 9) FREE by Nancy Skopin: “An intuitive detective, a kidnapped child, and an assassin with a heart of gold…”

This book is Free on March 30, 2026

A Midsummer Night's Murder (A Jack Dunn and Martha Healey Mystery Book 2)

A Midsummer Night's Murder (A Jack Dunn and Martha Healey Mystery Book 2) FREE by Maggie McChristie: A quiet day at the lake takes a deadly turn when Jack Dunn and Martha Healey discover a body on the beach. As they dig deeper, they find themselves tangled in a web of long-buried secrets. Someone got away with murder once. Now history may be repeating itself. And this time, the killer is watching.

This book is Free on March 30, 2026

Bad Reputation (Trespassing Book 1)

Bad Reputation (Trespassing Book 1) FREE by P.W. Creighton: Someone contacted the local radio station last night and left an alarming confession. Logan and his friends may be gossiping about it, but their only concern is getting through the last day of school before summer vacation. After all, tonight is the party of the year. But the weight of secrets will have a costly price.

This book is Free on March 30, 2026

Palm Beach Poison (Charlie Crawford Palm Beach Mysteries Book 2)

Palm Beach Poison (Charlie Crawford Palm Beach Mysteries Book 2) FREE by Tom Turner: Never say no to Vasily Zinoviev. Or you could end up like the ‘working girl’ who skinny-dipped in the wrong pool. Living in a $20 million oceanfront mansion with a harem of mistresses, Vasily and his brother are more than a handful for Palm Beach homicide detective Charlie Crawford.

This book is Free on March 30, 2026

Bloody Deeds (Detective Jane Rieger-Franklin Mystery Book 3)

Bloody Deeds (Detective Jane Rieger-Franklin Mystery Book 3) FREE by Stephen Kronwith, M.D.: A brutal double homicide. Impossible DNA evidence. A detective framed for murder. When DNA links her colleague to a shocking crime, Detective Sergeant Jane Rieger-Franklin must expose forged surveillance and manipulated DNA before a killer rewriting the truth gets away with murder.

This book is Free on March 30, 2026

Total Darkness

Total Darkness FREE by Carter Woods: When the power dies, Harper's ready. Supplies for a year. Weapons. A plan. What she doesn't have is enough for two people. And the stranger at her gate knows things about the blackout that Harper needs to hear — if she can keep them both alive long enough to listen.

This book is Free on March 30, 2026

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