This book is part autobiography and part an account of investigations of a variety of unusual events/sightings in the San Luis Valley of Colorado.
The book covers the period 1993 to 2006, and documents UFOs, balls of light , unmarked helicopters, Bigfoot sightings and, nastiest of all, mutilated animals, mostly cattle. It is to O'Brien's credit that he doesn't instantly blame aliens , but instead looks at all these occurances in chronological order, thereby allowing the reader to draw their own conclusions.