Hawking's Hellway (The Accelerati Trilogy)

Nick's friends can't help him, as they are spread across the globe grappling with their own mysteries--with Vince in Scotland, Caitlin and Mitch on their way to New Jersey, and Petula's whereabouts unknown. On his own, Nick must locate Tesla's final inventions-- which are the most powerful of all, capable of shattering time and collapsing space.