To Have and Have Not on 15 October 1937 to a first edition print-run of approximately 10,000 copies. Cosmopolitan Magazine published a section of the novel as "One Trip Across" in 1934; Esquire Magazine published a section as "The Tradesman's Return" in 1936. The novel was adapted into a 1944 film, starring Humphrey Bogart and Lauren Bacall. The film, directed by Howard Hawks, changed the story's setting from Key West to Martinique under the Vichy regime, and made significant alterations to the plot, including getting rid of Hemingway's Marxist overtones, and turning the story into a romantic thriller centering on the sparks going on between
Biphasic and polyphasic sleep one solid block, and he expresses concern that the ways in which the polyphasic sleepers' attempt to limit total sleep time, restrict time spent in the various stages of the sleep cycle, and disrupt their circadian rhythms, will eventually cause them to suffer the same negative effects as those with other forms of sleep deprivation and circadian rhythm sleep disorder. Woźniak further claims to have scanned the blogs of polyphasic sleepers and found that they have to choose an "engaging activity" again and again just to stay awake and that polyphasic sleep does not improve one's learning ability or creativity.