An old Tibetan monk has presented Paul and Sarah Manhart-the world's only husband and wife cryptozoology team-an unusual gift: a claw from a pterosaur Paul identifies to have lived during the time of the dinosaurs. The problem is that the claw is less than sixty years old, enticing them to embark on a expedition to the "rooftop of the world" to see whether others of its kind still roam the rarified air of Tibet. Only they hadn't bargained on getting...