This collection of seven stories featuring Professor Augustus S.F.X. Van Dusen, "The Thinking Machine," was first published in 1907. The narratives previously appeared in the Boston American newspaper in late 1905. The stories present a bank robbery, a murder that may be suicide, a mysterious amnesiac, a haunted house, and a kidnapping. The book introduces Professor Van Dusen, a consulting detective in the Sherlock Holmes vein, but a unique character, not an homage or pastiche -- he's no Solar Pons. A remorseless logician, Van Dusen is a medical doctor, a lawyer, a scientist, and apparently a dentist as well. He's also managed to escape from prison. Not as well developed a character as Holmes, he serves mainly to facilitate resolving the riddle posed in each account, though with a charming crankiness. Character plays little role in these primarily puzzle stories, in which The Thinking Machine is often aided by reporter Hutchinson Hatch who does most of the legwork, but isn't his biographer. More Archie Goodwin than Dr. Watson. The stories begin promising much, but when solved it's something of a minor let down as when one discovers how a magic trick is done -- "Oh, is that all it is." Still good but somehow the reader is left expecting more. And sometimes, given the almost 120 years since these tales were written, the resolution is not all that mysterious -- we've seen it before. Enjoyable and entertaining, but not fully developed characters or stories. American Jacques Futrelle (of Huguenot extraction) wrote one novel and 47 short stories featuring The Thinking Machine. During his lifetime a second collection of short stories appeared, The Thinking Machine on the Case (1908). With any luck Library of Congress Crime Classics (LCCC) will see fit to issue that volume also. Unfortunately Futrelle died on the Titanic in 1912 after forcing his wife into a lifeboat. Also a writer, she published some of his work posthumously. The LCCC is apparently the American counterpart to the British Library Crime Classics series, both of which are generous in sharing their mystery collections from the olden days. In these stories are such anachronisms as specifying a "gasoline car" (most autos ran on steam then) or an "incandescent light" as opposed to gas, or an easy acceptance of phrenology. [3½★]