Headcrash

Philip K. Dick Award: Best Novel winner (1995).
British Fantasy Society Best Novel nominee (1995).

A Junior Engineer for Monolithic Diversified Enterprises, Jack Burroughs finds himself caught in a tangled cyberweb of corporate double-dealing and virtual espionage. And when he's forced to put his life on-line, it becomes apparent that his grip on (virtual) reality is by no means secure.