Underground: Tales of Hacking, Madness and Obsession on the Electronic Frontier is a 1997 book by Suelette Dreyfus, researched by Julian Assange. It describes the exploits of a group of Australian, American, and British black hat hackers during the late 1980s and early 1990s, among them Assange himself. The book also mentions other hackers who had contacts with the protagonists, among them Erik Bloodaxe of the Legion of Doom and Corrupt of the Masters of Deception.