Of the many books on UFOs and aliens, this one may be unique. Richard Dolan, one of the world's leading historians of the UFO subject, has analyzed the different alien types and agendas based on longstanding patterns observed by witnesses. This is both a careful review of the best evidence we have of human-alien interaction, as well as a bold speculation of just who the aliens are and what they want. Dolan's analysis starts with our ancient pre-history...