Raise the Devil — Terence Faherty

How do you stop a vicious killer whose motive is vengeance and whose prey is a movie company on an isolated California ranch?
In 1962, Scott Elliott, top operative of Hollywood Security, problem solvers of last resort, travels to Las Vegas to rescue a starlet, Beverly Brooks, who has fallen afoul of a move-struck gangster. When Brooks and the producer of her current film, a cut-rate Cleopatra, are later killed in a fiery plane crash, Elliott follows a bloody trail from the ranch to Los Angeles and back again. There he must deal with a murderous evil - and the knowledge that his actions may have unleashed it.