Snow Crash, Neal Stephenson

In reality, Hiro Protagonist delivers pizza for Uncle Enzo's CosoNostra Pizza Inc., but in the Metaverse he's a warrior prince. Plunging headlong into the enigma of a new computer virus that's striking down hackers everywhere, he races along the neon-lit streets on a search-and-destroy mission for the shadowy virtual villain threatening to bring about infocalypse. Snow Crash is a mind-altering romp through a future America so bizarre, so outrageous… you'll recognize it immediately.