"Lemmy Caution is a fictitious Federal Bureau of Investigation (FBI) agent\u2014or in later stories a private detective\u2014created by British writer Peter Cheyney (1896\u20131951), who published the first book about him in 1936. When This Man Is Dangerous was released, Cheyney was a policeman, but the novel's success enabled him to become a professional author. Cheyney wrote 10 Lemmy Caution novels between 1936 and 1945."@en .