Professor Van Dusen, M. D.: The Thinking Machine

Jacques Futrelle is best known for writing short detective stories featuring Professor Augustus S. F. X. Van Dusen, also known as “The Thinking Machine” for his application of logic to any and all situations. In dozens of stories, The Thinking Machine solved locked-room puzzles, kidnappings, and murders.
This collection, which includes the elusive “The Mystery of Room 66,” seldom found in any collection, presents 50 short stories featuring Professor Augustus S. F. X. Van Dusen as The Thinking Machine. With the exception of the apparently impossible-to-find “The Yellow Diamond Pendant,” other stories that feature The Thinking Machine are full length novels.