Behind the grinning, mustached Guy Fawkes mask of the hacktivist group Anonymous, numerous faces and groups shift its shape as they select targets including companies, and Arab governments.
Anthropologist Gabriella Coleman has studied Anonymous for six years, watching the online activists as they morphed from cybervandals into more of a political movement.
Starting with a "deviant style of humor" that targeted anyone and anything, Anonymous has grown into a force feared by both companies and governments. Its members regularly take websites offline and steal information to expose secrets.
In her new book, "Hacker, Hoaxer, Whistleblower, Spy: The Many...