To Have and Have Not is a novel by Ernest Hemingway published in 1937 by Charles Scribner's Sons. The book follows Harry Morgan, a fishing boat captain out of Key West, Florida. To Have and Have Not was Hemingway's second novel set in the United States, after The Torrents of Spring.

Written sporadically between 1935 and 1937, and revised as he traveled back and forth from Spain during the Spanish Civil War, the novel portrays Key West and Cuba in the 1930s, and provides a social commentary on that time and place. Hemingway biographer Jeffrey Meyers described the novel as heavily influenced by the Marxist ideology Hemingway was exposed to by his support of the Republican faction in the Spanish Civil War while he was writing it. The work got a mixed critical reception.[1]

The novel had its origins in two short stories published earlier in periodicals by Hemingway ("One Trip Across" and "The Tradesman's Return") which make up the opening chapters, and a novella, written later, which makes up about two-thirds of the book. The narrative is told from multiple viewpoints, at different times, by different characters, and the characters' names are frequently supplied under the chapter headings to indicate who is narrating that chapter.