When Dr. Emma McCallan is chosen to run a three-month series of NASA experiments aboard a space station, the stated purpose of her task is to monitor how Archaeons adapt to zero gravity. But the true origin of these single-cell organisms has not been revealed to McCallen -- or even to NASA -- and soon the world is threatened by a terrifying new disease that only Emma can kill, unless it kills her first.

This paperback book is in good condition and weighs 6.1 oz.