On a late August day in the foothills of the Cascades, five bicyclists climb into the hot, dry air, the breeze of their movement cooling their overheated bodies, the stress of a workweek slipstreaming behind them. But another group has entered the park, too. They're in cars, for pleasure and for vengeance. In Earl Emerson's gripping new novel, a grudge turns an idyllic setting into a terrifying landscape of men and nature at their most dangerous.

Zak Polanski doesn't do long-term relationships, doesn't like rich people, and, after saving Nadine Newcastle from an accident scene, isn't ready to be loved back. When the improbable affair sours, Zak returns to his old ways. But Nadine's former boyfriend, William Potter III, can't let it go. Potter knows that Zak is one of five mountain bikers at an isolated camping ground at Panther Creek, and has come for a little payback.

What starts as a nasty prank soon escalates. Someone has a gun. Someone makes a move. And a spark ignites amid a volatile mix of anger and alcohol, pride and betrayal. Now, men and women cut off from their urban environment are making choices, choosing sides, facing one another's demons and their own. And when human hatred merges with nature's fury, the only goal is to get out alive.

A mesmerizing novel that weaves the story of a charged love affair with a drama of sheer survival, Primal Threat is a thriller delivered with the brawny, vivid, and lyrical style that makes Earl Emerson one of the most compelling storytellers of our time.