From Wikipedia, the free encyclopedia Robert Graysmith (born September 17, 1942) is a true-crime author of the books Zodiac; Zodiac Unmasked: the Identity of America's Most Elusive Serial Killer; Unabomber: a Desire to Kill; The Sleeping Lady: The Trailside Murders Above the Golden Gate; The Murder of Bob Crane: Who Killed the Star of Hogan's Heroes?; The Bell Tower: The Case of Jack the Ripper Finally Solved, Amerithrax: The Hunt for the Anthrax Killer and The Laughing Gorilla: The True Story of the Hunt for One of America's First Serial Kil…