Brief review to be added of Robert Chapman's book “UFO : Flying Saucers Over Britain?” (also published as “Unidentified Flying Objects”) (1969) (available on Amazon USA and on Amazon UK)

Brief review to be added of “Extra-Terrestrial Intelligence : The First Encounter” (1976), edited by James L Christian (available on Amazon USA and on Amazon UK)

Brief review to be added of Maurice Chatelain's book “Our Cosmic Ancestors” (1987) (available on Amazon USA and on Amazon UK)

Brief review to be added of Paul Christopher's book “Alien Intervention: The Spiritual Mission of UFOs” (1998) (available on Amazon USA and on Amazon UK)