49 Tales of The Thinking Machine (49 detective stories featuring Professor Augustus S. F. X. Van Dusen, also known as "The Thinking Machine")

The Wonder Cats Mysteries 3-Book Box Set: Books 1-3

The Thinking Machine on the Case

Firefly Junction Cozy Mystery Series: Books 1-3

The Diamond Master

The Complete Father Brown Mysteries (Unabridged)

The Leak

The Great Thinking Machine: "The Problem of Cell 13" and Other Stories

Happiness is a Smoking Gun: (A Clarissa Spencer Cozy Mystery Book 1)

The Chase of the Golden Plate

The Black Cat

Professor Augustus Van Dusen: 49 Detective Mysteries in One Edition: Adventures of The Thinking Machine

The Fall of the House of Usher

Elusive Isabel

Maddie Swallows Mysteries: A humorous New Mexican cozy mystery duet

The Complete Sherlock Holmes: Novels and Stories, The Adventures of Sherlock Holmes, The Return of Sherlock Holmes, The Hound of the Baskervilles, A Study in Scarlet, His Last Bow

The Raven