Professor Craig Kennedy is a scientist detective at Columbia University. He uses his knowledge of chemistry and psychoanalysis to solve cases, and uses exotic devices in his work such as lie detectors, gyroscopes, and portable seismographs.
"The Ear in the Wall" – District Attorney Carton is running for elections and is trying to clean up the corruption that has ruled the city, especially a few major criminals that have bonded together to keep things lucrative for themselves. In order to unravel a tangled web of corruption and criminal activity he will need a help from Professor Kennedy and his sidekick Walter Jameson.

Arthur B. Reeve (1880-1936) was an American mystery writer. He is best known for creating the series character Professor Craig Kennedy, sometimes called "The American Sherlock Holmes", and Kennedy's Dr. Watson-like sidekick Walter Jameson, a newspaper reporter. Kennedy is a scientist detective at Columbia University who uses his knowledge of chemistry and psychoanalysis to solve cases, and uses exotic devices in his work such as lie detectors, gyroscopes, and portable seismographs. Many of Reeve's novels were turned into films.