After the Fall — Kristine Kathryn Rusch

Peter enjoys his solitary life in the Montana countryside. Higher mathematics, greater thought, sustain him more than companionship. But after a solitary walk along his isolated property's borders results in a potentially deadly fall, he fights like hell to survive, knowing no one will come to rescue him.

So, when he starts seeing things -- a creature he knows can't exist -- he grasps at his one chance for survival: believing in the impossible.

“Rusch is a great storyteller.”
-- RT Book Reviews