Who was the cop killer? A Silent? Their anger launched the crime wave that brought the Terrans to Egar. Could one of them be ruthless enough to want the police out of the way--permanently? A Normal? The telepathic aliens seemed friendly enough--but psychotics could fake innocence. And if their culture permitted a murderous conspiracy--how were the humans to know? A Terran? Faced with culture shock on a strange world--their innermost thoughts open to the mind-readers--fears and pressures mounted. Had one of their own gone mad? As the cops tried to solve the mystery, somewhere the assassin waited.