Exchange: Book One of the Exchange Universe

It's called Bear Country, an untamed alternate reality where humans never evolved, but saber-tooth tigers and suspiciously intelligent little green monkeys did. Random chunks of Bear Country are temporarily swapped-exchanged-with Earth, bringing a risk-averse, bubble-wrapped society unimagined threats, from giant bears to the hazards of unknown bacteria. They also bring opportunity for anyone brave enough-or crazy enough-to settle there. Computer guru Sharon Mack prepares to evacuate when s...