Hired as a bodyguard for diva Bette Davis, this wisecracking Hollywood PI better fasten his seat belt, it's going to be a bumpy night.   Bette Davis has three words to describe her hotel hideaway: "What a dump!"   After two days locked in a rented room with the acid-tongued actress, private eye Toby Peters is starting to feel like he's her husband—instead of Arthur Farnsworth—and he wants a divorce. The diva's real hubby—an aeronautics engineer with a head full of government secrets and a gang of blackmailers on his trail—has hired Peters to keep Bette safe from kidnappers. But when thugs burst through the hotel room door, it's almost a relief.   Almost . . .   Because Peters still has a job to do. And to rescue the snatched star, he needs to crack a Nazi spy ring while at the same time keeping a bit of indiscreet evidence involving Bette and Howard Hughes from falling into the wrong hands . . .   "For anyone with a taste for old Hollywood B-movie mysteries, Edgar winner [Stuart M.] Kaminsky offers plenty of nostalgic fun" in the Toby Peters mysteries. "The tone is light, the pace brisk, the tongue firmly in cheek" ( Publishers Weekly).