Playback

Playback is the final complete novel by Raymond Chandler, which features his iconic creation Philip Marlowe. It was published in 1958, the year before his death.
Marlowe is hired by an influential lawyer he's never herd of to tail a gorgeous redhead, but decides he prefers to help out the redhead. She's been acquitted of her alcoholic husband's murder, but her father-in-law prefers not to take the court's word for it.