The interaction between mankind and spiritual beings as recorded in scriptures and ancient texts provides a powerful drama that spans Heaven and Earth, involving worship and devotion, eternity and mortality, love and sex, jealousy and murder. But how much of these are based on real happenings and how much is based on myth? With a visionary's ardor and a scientist's attention to detail, Zecharia Sitchin gives a stunning account of human interaction with celestial travelers.