Mystery

Decades-Old Mysteries, High-Stakes Escapes, and Twisted Discoveries: Free Mystery / Thriller eBooks

Frosting and Foul Play (Willow Creek Mysteries Book 2)

Frosting and Foul Play (Willow Creek Mysteries Book 2) FREE by Diana Freel: A festive baking competition turns deadly in Willow Creek, and Claire Anderson is once again at the center of it all. What looks like a tragic accident quickly begins to unravel. The timeline does not quite fit, and certain reactions feel off. As secrets surface and tensions rise, Claire realizes this was not an accident. Someone planned it.

This book is Free on May 23, 2026

Dashiki

Dashiki FREE by Florence Wetzel: Jazz journalist Virginia Farrell investigates the murder of reclusive singer Betty Brown after discovering priceless tapes of a Monk-Coltrane gig. With her roommate Socks and Detective Robert Smith, she dives into the world of jazz, uncovering secrets, romance, and a connection to an unsolved crime.

This book is Free on May 23, 2026

Murder at Farrington Hall (A Dodo Dorchester Mystery Book 1)

Murder at Farrington Hall (A Dodo Dorchester Mystery Book 1) FREE by Ann Sutton: Lady Dorothea “Dodo” Dorchester has a sharp eye for fashion—and murder. At a glittering weekend at Farrington Hall, a theft turns deadly. Can Dodo outsmart, suspects, and reluctant police to catch a killer? Perfect for fans of The Thursday Murder Club and classic country-house cozies.

This book is Free on May 23, 2026

Girl Trap (A Madeline Dawkins Mystery 11)

Girl Trap (A Madeline Dawkins Mystery 11) FREE by Cynthia Hamilton: Two inquiries come to MDPI on the same day that seem like fairly routine missing person cases. But it doesn’t take long to discover there’s nothing ordinary about the disappearance of two beautiful sisters from Minnesota or the estranged heiress who has never touched her 8-figure fortune and apparently does not want to be found. Series book 3 of 9.

This book is Free on May 23, 2026

The Grand Man

The Grand Man FREE by Florence Wetzel: Juliet Brown, an American jazz journalist, and ScandiGeek, travels to Stockholm and becomes involved in two unsolved mysteries: the 1986 murder of prime minister Olof Palme and the disappearance of Stieg Larssons fourth book. Along with journalist Magnus Lindblom, Juliet navigates Swedish winter in Stockholm's Old Town to uncover the truth.

This book is Free on May 23, 2026

The Things We Keep (The Jeri Howard Mystery Series Book 14)

The Things We Keep (The Jeri Howard Mystery Series Book 14) FREE by Janet Dawson: Oakland PI Jeri Howard finds a battered footlocker hidden in a dusty storeroom. When she pries open the lid, she’s shocked at what she finds. TWO HUMAN SKULLS ON A PILE OF BONES. EMPTY EYE SOCKETS STARE UP AT HER.

This book is Free on May 23, 2026

Maids of Misfortune (A Victorian San Francisco Mystery Book 1)

Maids of Misfortune (A Victorian San Francisco Mystery Book 1) FREE by M. Louisa Locke: Maids of Misfortune,is the first book in M. Louisa Locke’s USA Today bestselling Victorian San Francisco mystery series. Featuring Annie, a widow who supplements her income as the pretend clairvoyant, Madam Sibyl, and Nate Dawson, a local lawyer, romance blooms as they investigate the murder of one of Madam Sibyl's clients in this cozy mystery.

This book is Free on May 23, 2026

Ben in Trouble (Ben Mitchell/Titus Ray Thrillers)

Ben in Trouble (Ben Mitchell/Titus Ray Thrillers) FREE by Luana Ehrlich: CIA covert operative, Titus Ray, agrees to help his protégé, Ben Mitchell, out of a tough spot by accepting an assignment to Venezuela, but when the operation takes a deadly turn, Titus is forced to do something he’s never done before—rely on Ben to bring them home.

This book is Free on May 23, 2026

The Woman Who Went Overboard

The Woman Who Went Overboard FREE by Florence Wetzel: Looking for summer reading? A luxury cruise through Norway’s fjords becomes a deadly battleground when two women compete for a wealthy widower’s heart. But only one will make it to shore. A chilling Nordic thriller!

This book is Free on May 23, 2026

Where No One Can Hear You (The Survivor Stories Book 1)

Where No One Can Hear You (The Survivor Stories Book 1) FREE by J.E. Rowney: A harrowing survival thriller inspired by a true story: As best friends Amanda and Sarah walk through the woods, someone attacks them… Weeks later, Amanda wakes up in the hospital with amnesia — and a brutal wound that robs her of her voice. Can Amanda piece together her fractured memories and find Sarah?

This book is Free on May 23, 2026

A Noble Truth

A Noble Truth FREE by Robert Mix: Noble Gareth’s childhood premonition of the Pan Am 103 bombing set him on the path to becoming a psychic. After an unfortunate error jeopardizes his career, he’s persuaded to return to Scotland to find a missing biochemist—and soon uncovers a conspiracy entangling a powerful pharma giant, a tech mogul, and a distrustful community.

This book is Free on May 23, 2026

Accidental Murder (Daryl Wood Gerber Standalone Thrillers Book 3)

Accidental Murder (Daryl Wood Gerber Standalone Thrillers Book 3) FREE by Daryl Wood Gerber: When Kayla Macintyre discovers her twin sister Ashley brutally murdered, grief quickly gives way to terror—because Kayla was the real target. A case of mistaken identity fools the police into thinking she’s the one who died, and Kayla seizes the chance to disappear into her sister’s glamorous life as a supermodel.

This book is Free on May 23, 2026

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Val Fremden Midlife Misadventures Cozy Mystery Series

Glad One: Crazy is a Relative Term (Val Fremden Midlife Misadventures Book 1)

Glad One: Crazy is a Relative Term (Val Fremden Midlife Misadventures Book 1) FREE by Margaret Lashley: A hilarious, beloved, no-murder cozy mystery series about starting over, found family, and accidental sleuthing. Val Fremden arrives home to St. Petersburg, Florida, with nothing. No friends. No money. No map forward. What she finds instead is the misfit tribe that hangs around Caddy's beach bar -- and a mystery that will change her life forever.

This book is Free on May 22, 2026

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The Serpent Thriller Series

The Serpent's Bridge (The Serpent Series Book 1)

The Serpent's Bridge (The Serpent Series Book 1) FREE by S.Z. Estavillo: Mexican immigrants are being murdered by a serial killer across Los Angeles. As the body count rises, Detective Anaya Nazario uncovers a disturbing pattern linking the victims and realizes the killer is targeting people the system ignores. Forced to work with her ex, FBI Agent Blake Huxley, she must stop the murders before more lives are lost.

This book is Free on May 22, 2026

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Senator Secrets, Comic Chaos, and Deadly Flights: Free Mystery / Thriller eBooks

Ghost Mortem (Ghost Detective Book 1)

Ghost Mortem (Ghost Detective Book 1) FREE by Jane Hinchey: When your dead bestie shows up asking you to solve his murder, you say yes—right? Even if it means trusting a smokin’ hot detective, inheriting a snarky talking cat, and questioning your own sanity. Welcome to Firefly Bay, where death is just the beginning.

This book is Free on May 22, 2026

Dead Men Don't Dig Tunnels (A Carolina Teal Cozy Mystery)

Dead Men Don't Dig Tunnels (A Carolina Teal Cozy Mystery) FREE by CC Trace: "Carolina, Angela, Jack, Goldie, & Kahlua are all back in the most intriguing book of this series. While celebrating the speakeasy history of the town with a huge costume party, everyone learns about the tunnels that run underneath most of the buildings in town... Twists & turns, secrets & potential criminal activity make this an excellent read."

This book is Free on May 22, 2026

Kiki Lowenstein Cozy Mystery (Books 1-3) (Kiki Lowenstein Mystery Box Sets Book 1)

Kiki Lowenstein Cozy Mystery (Books 1-3) (Kiki Lowenstein Mystery Box Sets Book 1) FREE by Joanna Campbell Slan: Fans of female amateur sleuths will love this heartwarming cozy mystery series. Perfect for crafters and animal lovers! This clean series will leave the reader cheering for lovable, imperfect, and endearing Kiki Lowenstein. "Entertaining and engaging ...with emotionally complex characters."--Reader

This book is Free on May 22, 2026

Damaged (A Tyler Zahn Mystery-Suspense Novel Book 4)

Damaged (A Tyler Zahn Mystery-Suspense Novel Book 4) FREE by Cam Torrens: A broken Air Force pilot. A quiet mountain town. A terror plot hiding in plain sight. Tyler Zahn came to Buena Vista to outrun his past. But when a kidnapping and a deadly threat to Colorado’s water system collide, he must face the one role he fears most: the man everyone is counting on. Perfect for fans of mystery series and high-stakes thrillers.

This book is Free on May 22, 2026

Capitol Murder (Shepherd & Associates Book 1)

Capitol Murder (Shepherd & Associates Book 1) FREE by Judith Erwin: Innocent, he's your best friend--Guilty, your worst enemy! Badass private investigator Jake Shepherd, a former FBI agent with a Yale law degree, meets savy Scarlett Kavanagh, who has a law degree from Harvard, when a mutual friend recommends Scarlett seek Jake's help to clear her estranged sister in the death of her husband--a U.S. Senator.

This book is Free on May 22, 2026

Inflatable Myth: When Religion Gets Organized

Inflatable Myth: When Religion Gets Organized FREE by Alan Rolnick: What if faith, money, and political ambition collided in the most outrageous way possible? In Inflatable Myth, Alan H. Rolnick delivers a sharp, satirical novel packed with crooked schemes, comic chaos, and South Florida absurdity. Where anything can happen and usually does. Enter a world where religion gets organized, but once it does, look out!

This book is Free on May 22, 2026

Not So Dead (A Sam Sunborn Novel Book 1)

Not So Dead (A Sam Sunborn Novel Book 1) FREE by Charles Levin: What if death was only the beginning? In Not So Dead, Sam Sunborn helps invent a way to upload the human mind—then terrorists, spies, and killers come for the technology that could change life forever. A fast, funny, near-future sci-fi thriller packed with danger, heart, invention, and twists. Start the Sam Sunborn adventure today! Download it now.

This book is Free on May 22, 2026

Tune Up (Detective Qigiq Book 2)

Tune Up (Detective Qigiq Book 2) FREE by Joe Klingler: Two seemingly unconnected incidents—a missing lawyer and an elderly hit-and-run victim—lead Qigiq and Kandy to a vintage motorcycle café, a million-dollar yacht, a cliffside confrontation, and a musician named Mylin. Young. Attractive. And illegal. "a high-octane exercise ...that will have you turning pages at fever pitch” - Pacific Book Review.

This book is Free on May 22, 2026

A Breath After Drowning

A Breath After Drowning FREE by Alice Blanchard: A child psychiatrist is haunted by a sinister presence, which threatens to destroy her relationship with the man she loves. “Terrifying… one of the most memorable villains since Hannibal Lecter.” — Wall Street Journal

This book is Free on May 22, 2026

Final Descent

Final Descent FREE by Audrey J. Cole: At 30,000 feet, the danger isn’t turbulence—it’s him. After suffering a breakdown from her divorce, airline pilot Claire Winslow is rebuilding her life with her five-year-old daughter. Just as she’s finding her footing, an online romance spirals into a chilling nightmare. Her first date with Evan goes wrong, and he begins stalking her.

This book is Free on May 22, 2026

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The Northwest Cozy Mystery Series

Murder on Bainbridge Island (Northwest Cozy Mystery Series Book 1)

Murder on Bainbridge Island (Northwest Cozy Mystery Series Book 1) FREE by Dianne Harman: When DeeDee's inaugural catering event becomes a crime scene, her budding business is thrust into jeopardy. The Seattle art world is rocked after Lisa, a prominent gallery owner, is found dead during the evening's festivities. All books available with Kindle Unlimited.

This book is Free on May 21, 2026

Other Books in the series

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The Harlowe & Fitch Historical Mystery Series

Murder at Mablethorpe Castle (A Harlowe & Fitch Historical Mystery Book 1)

Murder at Mablethorpe Castle (A Harlowe & Fitch Historical Mystery Book 1) FREE by Elizabeth Rose: A festive night erupts into murder at Mablethorpe Castle. As flames die and secrets surface, Lady Vivienne Harlowe refuses to back down—haunted by her parents’ unsolved deaths and driven to uncover the truth. With Sheriff Zachariah Fitch at her side, they must catch a killer who’s already set his sights on them.

This book is Free on May 21, 2026

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The Family or Foe Saga Thriller Series

First Cut (The Family or Foe Saga with Detectives Daniels and Remalla Book 1)

First Cut (The Family or Foe Saga with Detectives Daniels and Remalla Book 1) FREE by J.T. Bishop: A serial killer. A telepathic bond. And the one woman who survived him. She walked away once. Now Detectives Daniels and Remalla need former detective Jill Jacobs to walk back in — and the killer who never stopped watching is ready. First Cut — Book One in the Family or Foe Saga.

This book is Free on May 21, 2026

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Quirky Entrapments, Dark Retributions, and Engineering Survival: Free Mystery / Thriller eBooks

Magical Cozy Mystery Book Club Box Set (Books 1-3) (Magical Cozy Mystery Book Club Collections 1)

Magical Cozy Mystery Book Club Box Set (Books 1-3) (Magical Cozy Mystery Book Club Collections 1) FREE by Elizabeth Pantley: This book club dives (literally!) into the pages of a cozy mystery. This quirky group of brave members must solve the mystery to get out of the book. It’s so much fun - you’ll wish for a book club like this!

This book is Free on May 21, 2026

Murder on the Ghan (The Jack Rogan Mysteries)

Murder on the Ghan (The Jack Rogan Mysteries) FREE by Gabriel Farago: A cursed Outback opal. An iconic train journey. One fatal adventure. When journalist Jack Rogan helps an Aboriginal friend investigate a mine discovery, he and virtuoso Sophie Ritter are hunted by a ruthless bikie gang. Clashing with Dreamtime lore and deadly greed on the famous Ghan rail line, they must race against time to survive.

This book is Free on May 21, 2026

Limerick For Death (The Chronicles of Sharon O'Mara 6)

Limerick For Death (The Chronicles of Sharon O'Mara 6) FREE by Gregory C. Randall: Detective Kevin Bryan’s Irish inheritance is a death trap. Burdened by debt and a violent history, the crumbling castle hides smuggler tunnels and ancient horrors. To protect Kevin’s legacy, Sharon O’Mara must outmaneuver ruthless developers and shadows from the past. In County Cork, the price of land is paid in blood.

This book is Free on May 21, 2026

Ghosts Among the Gumtrees (Seka Torlak Mystery Book 2)

Ghosts Among the Gumtrees (Seka Torlak Mystery Book 2) FREE by Amra Pajalic: Melbourne, 1997, in a city that is a refuge to those escaping war and destruction, as well as a hiding place for war criminals seeking safe harbour, Seka exacts her retribution against the man responsible for genocide. Will Seka find her salvation, or will she lose her soul in the process?

This book is Free on May 21, 2026

Black Sky

Black Sky FREE by Ashley Judge: When an EMP plunges Atlanta into chaos, Ethan must protect his injured mother, his determined sister, and a fearless EMT. With no power, no phones, and no escape by car, survival means walking through a collapsing city where violence, desperation, and betrayal wait around every corner.

This book is Free on May 21, 2026

Jessup

Jessup FREE by Stephen Ainley: Jessup is scarred physically and emotionally by what he saw during World War 2. When not arguing with his best friend, Marlow, he broods in his room and contemplates suicide as the only way to escape his pain. Now he must choose between a new start in life or staying to help the one person who's treated him with respect.

This book is Free on May 21, 2026

The Banyan Project

The Banyan Project FREE by J.R. Mann: What happens when AI quietly pulls the plug on the world? Alex Miller thought he was just advising the ultra-wealthy. Instead, he helped build Banyan, a secret underground sanctuary for a chosen few. Then, the lights go out. Inside, survival is engineered. Outside, society fractures into barter and blood. Perfect for fans of Silo and 1984.

This book is Free on May 21, 2026

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The Redemption Detective Agency Cozy Mystery Series

The Mysterious Case of the Missing Motive (The Redemption Detective Agency Book 1)

The Mysterious Case of the Missing Motive (The Redemption Detective Agency Book 1) FREE by Michele PW (Pariza Wacek): After losing her job, fiancé, and apartment, Emily Hildebrandt has no choice but to move in with her eccentric Aunt Tilde—and fake-work at her ridiculous detective agency. But when a real case lands in their laps, suddenly it's not so funny anymore.

This book is Free on May 20, 2026

Other Books in the series

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Haunted Towns, Framed Escapes, and Shifting Suspects: Free Mystery / Thriller eBooks

A Camper and Criminals Cozy Mystery Box Sets (Books 1-10) (Tonya Kappes Books Cozy Mystery Collections)

A Camper and Criminals Cozy Mystery Box Sets (Books 1-10) (Tonya Kappes Books Cozy Mystery Collections) FREE by Tonya Kappes: Campground cozy mystery box set with murder Mae West never expected her glamorous New York life to end with an FBI raid, a disgraced husband, and nowhere to go. When her husband is arrested for a massive Ponzi scheme, Mae loses everything—except one unexpected inheritance: a rundown campground in Normal, Kentucky, and an RV she barely knows how to use and now her husband shows up murdered.

This book is Free on May 20, 2026

The Last Snapshot

The Last Snapshot FREE by Diana Freel: Some secrets refuse to stay buried… Before the bakery. Before the investigation. Before Willow Creek changed everything… this is where Claire’s story begins. Claire Anderson is finally close to the life she has been working toward. A quiet town. A fresh start. A bakery that will soon open its doors. Then her best friend is found dead.

This book is Free on May 20, 2026

Magic in Moon Lake Box Set (Books 1-3)

Magic in Moon Lake Box Set (Books 1-3) FREE by Lucia Kuhl: A fresh midlife start. A haunted town. And murder she didn’t see coming. Sydney Hovan returns to Moon Lake for peace, but finds a jealous ghost, a growing list of suspects, and a dangerously charming cop. Can she solve the crimes before she’s next? Perfect for fans of quirky families and deeply rooted friendships.

This book is Free on May 20, 2026

Shifters (A Samantha Reece Mystery Book 1)

Shifters (A Samantha Reece Mystery Book 1) FREE by Jaime Johnesee: When shredded remains turn up in hotel bathtubs all over Birmingham, FBI Agent Samantha Reece and her partner, Quinn O'Reilly, are assigned to investigate. Luckily, Sam has an ace up her sleeve in her ability to shift into a werepanther, enhancing her senses when she's on the hunt.

This book is Free on May 20, 2026

Hunter (Book 1)

Hunter (Book 1) FREE by Heath Stallcup: Born of Viking stock and careered into the Swedish Navy, Sven Ericsson finds himself in the fabled New World. Away from the restraints of society, the young Northman is dragged into long nights of debauchery; nights that lead him into the waiting arms of a dark beauty who will change his very nature forever.

This book is Free on May 20, 2026

New Australia

New Australia FREE by Joseph Helensky: Framed and shipped to a secret prison colony in Greenland—America’s 51st state—David uncovers a deadly government conspiracy. Outnumbered and hunted, escape is his only shot at exposing the truth.

This book is Free on May 20, 2026

Left Hanging

Left Hanging FREE by Maria Frankland: I've always suspected I'm not enough for my husband and that he'd come out eventually. But I'll do 'anything' to keep him...

This book is Free on May 20, 2026

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