Nick and Nora Charles the bantering, romantically involved detective duo has become a well-used trope in literature, stage, screen, and television ever since. The characters first appear in Dashiell Hammett's best-selling last novel "The Thin Man" (1934). Nick is an alcoholic former private detective who retired when he married Nora, a wealthy Nob Hill heiress. Hammett reportedly modeled Nora on his longtime partner Lillian Hellman, and the characters' boozy, flippant dialogue on their relationship. (The novel also mentions that Nick was once a Pinkerton detective, as was Hammett.) The novel is considered one of the seminal texts of the hard-boiled subgenre of mystery novels,
Pinkerton (detective agency) Mexico. Due to its conflicts with labor unions, the word "Pinkerton" continues to be associated by labor organizers and union members with strikebreaking. Pinkertons diversified from labor spying following revelations publicized by the La Follette Committee hearings in 1937, and the firm's criminal detection work also suffered from the police modernization movement, which saw the rise of the Federal Bureau of Investigation and the bolstering of detective branches and resources of the public police. With less of the labor and criminal investigation work on which Pinkertons thrived for decades, the company became increasingly involved in protection services, and in the