No Sign of Murder — Alan Russell

Beautiful, deaf heiress, Anita Walters, spent her days involved in cutting-edge primate research--teaching a gorilla named Joseph to communicate through sign language. By night she ran wild with a dangerous crowd. And six months ago she vanished.

For Stuart Winter, a missing persons investigation soon becomes an obsession--plunging the defrocked stockbroker--turned-p.i. into Anita's bizarre nightworld of erotic artists, cruel pleasures and cheap thrills. And the only one with a clue to the lost lovely's fate seems to be her loyal simian student. But Joseph isn't talking because there's no sign for murder.