Gridrunner — Thomas M. Reid

In a novel based on the popular science fiction role-playing game, a female black-market courier journeys to the Verge to enter the virtual reality world of the Grid to deliver a pair of data crystals to her mysterious contact, The Fool, but when the exchange goes awry, she is forced into a perilous alliance with an undercover agent to battle a crime syndicate, gunrunning terrorists, and her own sadistic employer. Original.