This is a fascinating take on the alien phenomenon as something which, whether real or not, gives us an insight into who we are and what our aspirations are as humans. Appleyard writes both lucid and dense prose covering literature, film and science, dissolving the boundaries between fact and fiction for the purposes of his very convincing argument. For that reason, you don't really have to believe in ufos, abductions etc. to enjoy this book. It's more about what these experiences/fantasies tell us about ourselves.
Only one quibble. He may not have had much say in this but I think the title could have been less geeky-sounding - I nearly didn't buy it because of that and the cover. The whole package seems frivolous but inside is a treatment that is very serious, very intellectual, quite challenging and fired by an intense personal interest.