The heart-stopping second novel from the author of Nightwatching, in which a father-son ski weekend becomes a desperate fight for survival At twelve years old, Zach admires his father almost as much as he fears him. When Bram takes him on a father-son ski trip in the Colorado backcountry with a few select others, Zach feels brave, cautiously optimistic--his mother taught him the ways of the mountain, and the hushed whiteness should quiet Bram's complaints, his temper. But Zach knows his father well enough to always be on high alert: to the shifting dynamics inside the cabin, to his father's every move, to what lies beyond the warmth of the fireplace. Because something is out there, on the mountain. Something that's killing animals and picking them clean. And when the trip takes a turn for the worse, Zach fears he's in more danger than he realized. He'll have to rely on his own survival skills if he hopes to make it home alive--but will that be enough?