Bridgers 1: The Lure of Infinity (Bridgers Series, Book 1) (Unabridged‪)‬

Some worlds are better left alone.

Infinity Fowler has been fighting all her life. As a kid, she fought to survive. Then, she fought professionally. When humans obtained the technology to bridge to alternate versions of Earth, she saw a chance for a new life. She signed up to become a bridger—an elite survival expert who protects tourists bridging to alternate worlds. Desmond Weaver is making a last-ditch effort to complete his PhD in evolutionary biology. He has booked the excursion of a lifetime, a data-collecting mission to a vastly different version of Earth. If he fails, his career is over.

Infinity is Desmond’s assigned trainer and bridger. She’s one of the best, willing to die protecting tourists. She’s also willing to kill. When the time comes to bridge, Desmond and his two college roommates feel well prepared. But they aren’t. Naked and weaponless, in an extraordinary world teeming with lethal predators, the team becomes entangled in a life-and-death struggle more terrifying than anything they could have imagined.