"The Thin Man" movies were based on stories written by which of the following authors?

Samuel Dashiell Hammett ( May 27, 1894 – January 10, 1961) was an American author of hard-boiled detective novels and short stories, screenwriter, and political activist. Among the enduring characters he created are Sam Spade (The Maltese Falcon), Nick and Nora Charles (The Thin Man), and the Continental Op (Red Harvest and The Dain Curse).

Hammett "is now widely regarded as one of the finest mystery writers of all time".

In his obituary in The New York Times, he was described as "the dean of the... 'hard-boiled' school of detective fiction." Time magazine included Hammett's 1929 novel Red Harvest on its list of the 100 best English-language novels published between 1923 and 2005. His novels and stories also had a significant influence on films.