The Blue Hammer by Ross Macdonald

The desert air is hot with sex and betrayal, death and madness and only Archer can make sense of a killer who makes murder a work of art. Finding a purloined portrait of a leggy blonde was supposed to be an easy paycheck for Detective Lew Archer, but that was before the bodies began piling up. Suddenly, Archer find himself smack in the middle of a decades-long mystery of a brilliant artist who walked into the desert and simply disappeared. He left behind a bevy of muses, molls, dolls, and dames-each one scrambling for what they thought was rightfully theirs.