First published in 1924, J.S. Fletcher's Kellanpunainen timantti (The Red Diamond) is a classic locked-room mystery that feels both cozy and clever. Fletcher was a master of the genre in his day, and this book shows exactly why.

The Story

The story kicks off when a wealthy collector, Mr. Lester, is found dead in his study. The door is locked from the inside, and the window is securely fastened. Nothing seems to be missing... except for the legendary, priceless red diamond he had just acquired. Enter our determined investigator, who has to untangle a web of greedy relatives, shady dealers, and secretive servants. Everyone had a motive, and the list of suspects keeps growing. The hunt for the diamond becomes a race against time, with the killer still out there and possibly ready to strike again.

Why You Should Read It

What I loved most was the pure puzzle of it all. Fletcher plays fair with the reader. All the clues are there, laid out for you to find. It’s the kind of book that makes you put it down for a second to think, 'Wait, but if the butler said *that*, then the letter must mean...' The characters are vivid sketches of a bygone era—some are charming, some are suspicious, and they all have secrets. It’s not about gritty violence or psychological terror; it’s about the quiet, thrilling chase of logic. The solution to the locked room is genuinely clever and doesn't rely on any silly tricks.

Final Verdict

This book is perfect for anyone who misses the golden age of detective fiction. If you enjoy Agatha Christie's puzzles or the clean, clue-driven mysteries of Sherlock Holmes, you'll feel right at home here. It’s also a great pick for a rainy afternoon or a lazy weekend—a comforting, engaging read that makes you feel smarter by the end. Just be prepared to suspect everyone, even the family dog.