This astonishing story of an obsessive hacker promises to change the way you look at the Internet forever. At Large chronicles the massive manhunt that united hard-nosed FBI agents, computer nerds, and uptight security bureaucrats against an elusive computer outlaw who broke into highly secured computer systems at banks, universities, federal agencies, and top-secret military weapons-research sites. At Large blows the lid off the frightening vulnerability of the global online network, which leaves not only systems, but also individuals, exposed.