Colin Wilson 
World Famous Cults and Fanatics 

Dangerous madmen or divinely inspired prophets? From murdering religious sects like the Assassins and the Thugs, to the orgies of the little known Khlysty and the self-mutilations of the Skloptzi; including modern day killers like the vicious Manson Family and the violent racism of the Ku Klux Klan — this book shows how cults and fanatics had such a powerful effect on the world.