Snow Crash : Neal Stephenson

After the Internet, what came next? Enter the Metaverse - cyberspace home to avatars and software daemons, where anything and just about everything goes. Newly available on the Street - the Metaverse's main drag - is Snow Crash, a cyberdrug. Trouble is Snow Crash is also a computer virus - and something more. Because once taken it infects the person behind the avatar. Snow Crash bleeds into reality.