Let's set the scene: It's the 1920s, and New York City is buzzing about a master thief and killer known only as The Bat. He leaves a bat-shaped symbol at his crimes and has the police completely baffled.

The Story

Miss Cornelia Van Gorder, a sharp and fearless older woman, decides to spend the summer in a rented country mansion. She's convinced The Bat will strike her next, and she's almost looking forward to the challenge. She brings her timid niece, Dale, and a loyal maid. The house comes with a butler who seems to know too much. Soon, they're joined by a nervous banker hiding stolen securities and a local doctor with unclear motives. A massive storm hits, knocking out the lights and phone lines, sealing them all inside. Then, they find a body. Is The Bat one of the people in the drawing room? As the night goes on, hidden passages are discovered, more threats appear, and everyone looks guilty. Miss Cornelia, armed with logic and a steady nerve, becomes the detective we all wish we could be in a crisis.

Why You Should Read It

This book is a joy because of its heroine. Miss Cornelia is a revelation—a smart, older woman solving the crime while the men around her fumble. She's funny, practical, and utterly unflappable. Reading it, you get the real feel of a '20s parlor mystery: the atmosphere is thick with suspicion, every character has a secret, and the pace never lets up. It's not about graphic violence; it's about the tension of not knowing who to trust. You can see how it set the stage for so many country-house mysteries that came after it. It's also a snapshot of its time, with flappers and talk of bootlegging, but the core puzzle is timeless.

Final Verdict

Perfect for anyone who loves Agatha Christie-style puzzles, classic black-and-white movie mysteries, or just a really good, spooky story for a stormy night. If you think older mysteries might be slow, this one will change your mind—it's a brisk, clever, and surprisingly modern-feeling thriller with a fantastic leading lady. A genuine page-turner from the Golden Age of detective fiction.