Short stories by Arthur Conan Doyle outside of Holmes! 'The Lost Special' is a fantastic 'impossible disappearance' story about a train that vanishes. It's all about logical deduction from reported facts, and it scratches that same puzzle-solving itch.
Does a 'locked island' count? If so, 'The Seven and a Half Deaths of Evelyn Hardcastle' (the US title) absolutely belongs on this list. The time-loop mechanic turns the entire estate into a locked-room puzzle you have to solve over and over.
For a short story fix, you absolutely must track down any collection by Edward D. Hoch. The man wrote nearly a thousand mystery stories, and his character Dr. Sam Hawthorne specializes in impossible crimes in a small New England town. They're perfect little self-contained puzzles you can solve in one sitting.
If you want something that plays with the form, try 'The Tokyo Zodiac Murders' by Soji Shimada. It's incredibly detailed, with diagrams and a challenge to the reader to solve it before the reveal. The puzzle is bonkers complex, involving an artist's murder in a locked studio, and it feels like a real brain-teaser.
For something completely bonkers and meta, 'The Eighth Detective' by Alex Pavey presents a series of short mystery stories that are then deconstructed by a mathematician analyzing their structure. One involves a classic locked-room setup, and the book plays with the very rules of the genre.
With her enemies in pre-civil war Virginia still seeking her death, Esmerelda is forced to return to the future only days after wedding Lance. Because it was necessary to fake her death in order to stop her enemies from following her to the future, her new husband, Lance, was forced to stay behind. He’d placed a magic box for them to communicate until he found a way to safely be with her beneath the floorboards of the house.
Now, she must find it.
A task that is easier said than done!
“The Magic Box” is book two of the exciting paranormal-romance-mystery-thriller Esmerelda Sleuth Series
When Elena Hart meets billionaire Adrian Vale, her whole life changes fast; he showered her with gifts, love, care, and attention, and soon they got married,Elena thought she had found the perfect man.
But on her wedding night, strange women began to call her with unknown numbers each of them said the same words
“Do not marry him. Run before midnight.”
Before she could even check her phone, the calls had disappeared from her phone history.
After moving to Adrian's home, the Blackthorn Manor, she began to notice disturbing things. There's a locked room where no one is allowed to enter and Adrian keeps disappearing by midnight, she will hear women crying inside the walls, the workers in the house hardly speak to each other, and mirrors are covered. No one is allowed to pray in the house.
Elena searches for answers and she discovers the most horrible truth
The portraits hung inside the locked room were of Adrian's former wives
All of them are dead but somehow they still exist inside the manor watching.
Elena is trapped inside a house filled with dark secrets that she must fight to survive, expose the curse surrounding Adrian, and escape before she becomes the next woman trapped in the walls forever.
Jordy River and Matt Ethan never expected to cross paths in a way that would change everything. What starts as a chance encounter at a club quickly turns into a secret, passionate affair—an intense connection they know they shouldn’t have.
But just as their desire grows, life throws them a devastating twist: their parents are falling in love and plan to marry, which will make Jordy and Matt stepbrothers. Suddenly, every stolen glance, every hidden touch, carries the weight of forbidden temptation.
As they navigate the boundaries between family and desire, they must decide: can their secret survive the reality of their new lives, or will the truth force them apart? Between Closed Doors is a provocative, modern romance about love, secrecy, and the dangerous thrill of wanting someone you shouldn’t.
When Emma's sister vanishes, she's thrust into a deadly game of cat and mouse. A mysterious figure, hidden behind a mask, demands Emma play a twisted game of puzzles and clues to rescue her sister. With time running out, Emma must use her wits to unravel the mysteries and face the sinister forces behind the game. But as the stakes grow higher, Emma realizes the game is designed to test her limits, and the truth about her sister's disappearance may be more terrifying than she ever imagined. Will Emma solve the puzzles and save her sister, or will she become the game's next victim?
Meet Esmerelda Sleuth. Sleuth is her name and investigating is her game. (Paranormal Investigating, that is.)
Esmerelda makes a good living as an investigator in a rather progressive firm. She lives a stable and sensible life until she meets Lance; an old money "hottie" who works for a real estate firm next to her building. After accepting an invitation for a weekend getaway party, she quickly discovers that Lance has a secret. He is wealthy. That part is true. And, yes, he's procured a job as a realtor in the building next door. His secret is that he belongs to an underground society of humans who didn't abandon their connection to magic centuries ago when religion declared it evil and he has traveled through time specifically to find her and bring her back to his time to marry him. If that isn't enough of a far fetched tale to absorb, he informs her that she was born in his time to a family belonging to that same secret society and was promised in marriage to him as an infant. When enemies who didn't want to see the union of families take place made attempts on her life, her parents sent her into the future and erased her memories of them as a precaution.
Possessing virtually no belief in magic, ghosts, psychics, time travel, etc., it takes some doing on Lance's part to convince her to believe his story and go back with him. When she does, the lies, deceit and attempts on her life start all over again. Will she escape emotionally and physically unscathed?
"The Other Side Of the Mirror" is a steamy-paranormal-romance- mystery-thriller and book one of the Esmerelda Sleuth series.
Warning: Intended for Mature Readers
Before You Turn the Page.. These stories contain strong adult themes, explicit sexual situations, BDSM dynamics, power exchange relationships, age-gap romances, possessive heroes, emotional intensity, and themes that some readers may find provocative.
Inside these pages are nine interconnected darkly seductive stories of obsession, desire, temptation, power, surrender, and love found in the most unexpected places. Billionaires, criminals, athletes, club owners, and the women who bring them to their knees collide in a world where attraction is dangerous, rules are made to be broken, and one night can change everything.
This book is not sweet. It is not innocent. And it is certainly not tame.
If you prefer your romance scorching hot, emotionally intense, and unapologetically addictive, step inside.
The door is open.
What happens next is entirely your responsibility.
The locked-room concept is so strong it works in almost any medium. There’s a fantastic episode of 'Doctor Who' ('The Unicorn and the Wasp') with Agatha Christie and a locked-room murder at a party. It’s playful and full of references. Even a show like 'Brooklyn Nine-Nine' had a hilarious locked-room mystery parody in its 'The Box' episode. It proves the structure is timeless and flexible enough for comedy, horror, or drama.
If you want a book that turns the locked room puzzle inside out, try 'The Decagon House Murders' by Yukito Ayatsuji. It's a direct homage to Agatha Christie's 'And Then There Were None', but the locked room element is so tightly woven into the setting—an isolated decagonal house—and the structure of the story itself. The puzzle isn't just 'howdunnit'; it's about the narrative mirroring the architecture. The format feels refreshed because it uses the classic isolated setting trope but doubles down on the geometric, almost mathematical purity of the puzzle.
It also helped spark the 'honkaku' (orthodox) mystery revival in Japan, which prioritizes the puzzle above all else. In that sense, it redefined the format by going back to its roots with a modern, self-aware precision. It proves redefinition doesn't always require a new trick; sometimes it's about stripping everything away and perfecting the core mechanics with a new cultural sensibility.
I find the most interesting reinventions are in games, not books. The 'Zero Escape' series (visual novels) are essentially interactive locked-room mysteries where characters are trapped in a facility and have to solve elaborate puzzles to escape, with branching narratives based on your choices. The 'puzzle format' is literal—you click to solve riddles and escape rooms. The narrative mystery unfolds alongside the gameplay, with twists involving timelines, morphogenetic fields, and existential philosophy. It's a complete narrative and mechanical immersion into the locked-room concept that a passive book can't replicate. The player's own deduction (or failure) drives the story.
Let's not forget the Japanese honkaku tradition, which is practically built on locked-room and impossible crime puzzles. Besides Shimada, authors like Yukito Ayatsuji ('The Decagon House Murders') and Rintaro Norizuki are essential. Ayatsuji's book is an homage to Agatha Christie's 'And Then There Were None', but with a strictly logical, puzzle-box structure. The focus is entirely on the plot mechanics and the fair-play clueing. The characters can feel like chess pieces, but that's part of the genre's appeal in Japan—it's a battle of wits between author and reader. If you enjoy the cerebral, game-like aspect of mysteries above all else, diving into honkaku is a deep and rewarding well to explore.