Mack has investigated 76 UFO abduction cases over the past four years and here he summarizes 13 of them, offering his scholarly comments and controversial conclusions. These stories involve sexually explicit scenarios, terrifying in their implications for the nature of reality. The individuals Mack portrays have experienced deeply traumatic events that have transformed their lives, for the worse at first, but at last for the better. According to Mack, the aliens are objectively real and seem to be abducting people.

What sets this book above the average is his willingness to deal with some of his clients' assertions that they themselves are half-human and half-alien, at least psychologically or spiritually. Mack has shown the psychiatric community that the UFO abduction syndrome is a real problem that deserves serious clinical attention. Definetly a very very  good book.