Good novel. Here's a description:
Gordon Walker, screenwriter and actor, has systematically ruined his family and his health with cocaine and alcohol. Lee Verger is an actress of uncommon and unfulfilled promise, whom Gordon has known since the days when they were both young and fearless, and whose New Orleans childhood has left her with a tenuous hold on sanity. During the shooting of a film on the Pacific coast of Mexico, they resume a ritual struggle in which their desperate love for each other will either save or destroy them.