The wrong side of goodbye a novel

Summary: Harry Bosch is California's newest private investigator. After thirty years with the LAPD, he doesn't need to advertise or have an office, and he's picky about his clients. Then one of Southern California's biggest moguls comes calling. The reclusive billionaire is nearing the end of his life and is haunted by one regret. When he was young, he had a relationship with a Mexican girl, but she disappeared soon after becoming pregnant. Desperate to know whether he has an heir, the dying magnate hires Bosch, who finds uncanny links to his own past during the investigation. At the same time, unable to leave cop work behind completely, he volunteers as an investigator for a tiny, cash-strapped police department and finds himself tracking a serial rapist who is one of the most baffling and dangerous foes he has ever faced.