Mysterious lights in the sky. Alien abductions. Government cover-ups. Dedicated ufologists have spent years documenting unexplained phenomena from flying saucers to extraterrestrial life. Uncover the history of UFOs in this illustrated guide, which separates the science fiction from the facts.

Mysterious lights in the sky. Alien abductions. Government cover-ups. Dedicated ufologists have spent years documenting unexplained phenomena from flying saucers to extraterrestrial life. Uncover the history of UFOs in this illustrated guide, which separates the science fiction from the facts.