In the mountains around the small town of Silver Gap, Colorado, bark beetles--aided by a warming climate--are decimating the pine forests. That environmental degradation has brought Alex Converse, wealthy heir and would-be documentary filmmaker, to town. And his arrival coincides with another--the reappearance of wolves, long thought to be extinct in the state. But these are no ordinary wolves. They're big, cunning, ferocious, and very, very...