The Case of the Inverted Key

By Mark Collins

A locked room.
A dead man.
A key found inside-turned the wrong way.

When Scotland Yard is baffled by an impossible crime, Sherlock Holmes and Dr. John Watson are drawn into one of the most perplexing mysteries of their career. A respected gentleman is discovered dead inside a sealed study, the door bolted from within and the only key lying on the floor-inverted, as if turned by an unseen hand.

What begins as a classic locked-room puzzle soon spirals into a labyrinth of deception involving secret mechanisms, coded journals, and a web of family intrigue stretching back generations. As Holmes peels back the layers of fear, illusion, and misdirection, he uncovers a chilling truth: the most dangerous ghosts are not supernatural at all-they are born of guilt, greed, and the darkest corners of the human mind.

A deadly inheritanceA carefully engineered illusionA murderer convinced he has orchestrated the perfect crime

Holmes must untangle the threads before the killer strikes again-and before the locked room claims another victim.

Rich in atmosphere, faithful to the voice of Sir Arthur Conan Doyle, and filled with twists worthy of the Canon, The Case of the Inverted Key is a full-length Sherlock Holmes adventure for classic mystery lovers and modern readers alike.

Perfect for fans of:

Traditional Holmes pastichesLocked-room mysteriesVictorian detective fictionClever mechanical puzzles and psychological intrigue

Step into Baker Street once more-and unlock the truth behind the impossible.

• Format: Paperback
• Language: English
• ISBN: B0G48QDH64
• ISBN13: 9798276351803
• Release Date: November 2025
• Publisher: Independently Published
• Length: 178 Pages
• Weight: 0.49 lbs.
• Dimensions: 0.5" x 6.0" x 9.0"