Professor Craig Kennedy is a character created by Arthur B. Reeve.
Kennedy is a scientist detective at Columbia University similar to Sherlock Holmes and Dr. Thorndyke. He uses his knowledge of chemistry and psychoanalysis to solve cases, and uses exotic (at the time) devices in his work such as lie detectors, gyroscopes, and portable seismographs.
He first appeared in the December 1910 issue of Cosmopolitan, in "The Case of Helen Bond." He ultimately made 82 appearances in Cosmopolitan, the last coming in the August 1918 issue. He returned for many short stories in magazines as various as The Popular Magazine, Detective Story Magazine, Country Gentleman, Everybody's Magazine, and Flynn's, as well as in 26 novels. Through the 1920s, he became more of a typical detective. Craig Kennedy appeared in a number of 1930s pulp magazines, Complete Detective Novel Magazine, Dime Detective, Popular Detective, Weird Tales, and World Man Hunters, but many of these appear to be ghost-written as they lack the style and flavor of the teen-era Craig Kennedy stories. A series of six Craig Kennedy stories in early issues of Popular Detective are known to have been unsold novelettes rewritten by A. T. Locke.
The character's name was spoofed in 1916 by Douglas Fairbanks, who played "Coke Enneday" in the cocaine comedy film and Sherlock Holmes sendup The Mystery of the Leaping Fish.