Query: three co-ed killer
The Co-Ed Killer: A Study of the Murders, Mutilations, and Matricide of Edmund Kemper III
Edmund Kemper: The Life of the Co-Ed Killer (Biographies of Serial Killers)
Serial Killers: Ed Kemper The Co-Ed Butcher (Serial Killers, Murder, Murderers, True Crime, Horror, Gore Book 3)