For years, there have been unexplained sightings in the skies; could they be alien spacecraft? These 10 tales explore UFO lore, from the "Men in Black" to crop circles. In "The Alien's Revenge," a class visits the UFO Museum in Roswell and a boy finds himself alone there after dark. Two hundred students witness a UFO hovering over their school in "The Westall Incident." Are there logical explanations for the events in this book? Or is something more going on?