Dave Wencel takes a look at unidentified flying objects and reports  from those who claim to have seen them.  This 24 page book defines UFOs and provides data about accounts of sightings.  Other books in the Unexplained series are: The Bermuda Triangle, Bigfoot, ESP, Ghosts, Haunted Houses, The Loch Ness Monster, and Near-Death Experiences.  A glossary and index are included along with books to read and a website to visit for more information.