The Big Sleep (1946)
From wikipedia: The Big Sleep, like most of Chandler's novels, was written by what he called cannibalizing previously written short stories.Chandler would take stories he had already published in the pulp magazine Black Mask and rework them so that they fit together in one coherent story. In the case of The Big Sleep, the two main stories that formed the core of the novel were "Killer in the Rain" (published in 1935) and "The Curtain" (published in 1936). Although the stories were completely independent and shared no common characters, they had some similarities that made it logical to combine them. In both stories there is a powerful father who is distressed by his wild daughter. Chandler merged the two fathers into a new character and did the same for the two daughters, resulting in General Sternwood and his wild daughter Carmen. Chandler also borrowed small parts of two other stories: "Finger Man" and "Mandarin's Jade"