Back cover summary:

Deadly Force!

In San Francisco to attend VidCon, a video game convention, the Hardy's uncover a case of high-tech industrial espionage. The Xyrodian Corporation has lost some its most futuristic designs to the black market. And as Frank and Joe seek to trace the piracy to its source, they discover that the video games have taken on a new --- and dangerous --- dimension!

In a world of virtual reality, the games have been programmed for terror. The Hardys match wits and reflexes with gang of motorcycle marauders, back-alley brawlers, and Ninja warriors. But they know that the ultimate challenge will come at the hands of a computer and criminal mastermind --- an elusive foe who has already demonstrated a real genius for murder!