Turnback Ridge

"In a near-future Alaska in which global warming and immigration policy are wreaking havoc on lives and land, Nash Preston is trying to hold his family together. As the Alaska summer heats up, he ignores his expired visa--and now immigration bounty hunters are after him as he flees for the border with his sons. Their already fraught journey takes an alarming turn when his youngest, Robbie, picks up a mysterious fossil that makes him sick. When his boys are snatched and taken to a sinister detention facility, Nash must find a way to save them"--Page 4 of cover.