The Monkey's Raincoat by Robert Crais

When quiet Ellen Lang enters Elvis Cole's Disney-Deco office, she's lost something very valuable - her husband and her young son. The case seems simple enough, but Elvis isn't thrilled. Neither is his enigmatic partner and firepower, Joe Pike. Their search down the seamy side of Hollywood's studio lots and sculptured lawns soon leads them deep into a nasty netherworld of drugs and sex - and murder. Now the case is getting interesting, but it's also turned ugly. Because everybody, from cops to starlets to crooks, has declared war on Ellen and Elvis. For Ellen, it isn't Funtown anymore. For Elvis, it's just a living. He hopes. - Book Jacket