Mammoth Book of UFOs

The ultimate guide to the history, background and meaning of whether UFOs really exist, plus associated phenomena such as alien abduction, crop circles and cattle mutilations. There is also a comprehensive overview of the many conspiracy theories which surround UFOs and abductions - from the craft as secret Nazi technology to weird CIA plots. Written by a ufologist with many years in the field, this exciting and highly provocative book at times reads like a thriller. What messages do UFOs hold for us and for the future of life on earth?