The Moving Target is a 1949 mystery novel by American writer Ross Macdonald, who at this point used the name "John Macdonald".
This is the first Ross Macdonald novel to feature the character of Lew Archer, who would define the author's career. Lew Archer is hired by the dispassionate wife of an eccentric oil tycoon who has gone missing. Archer must dig through a strange cast of Los Angeles characters, finding crime after crime before he can get to the job he was hired to do.