This is one of the books which I read countless times as a child between the ages of 8 and 12. I have no idea where I picked it up or what I found so fascinating about it. It shares its special category with several of the more normal children's books as well as other equally puzzling obsessions like
Legend of the Seventh Virgin by Victoria Holt.
I no longer own my original copy of the book-- probably got rid of it in a fit of shame somewhere around college, and so I was delighted when I saw a copy second hand. Even so many years later, I could probably write the opening chapters from memory-- up to and including the point where the aliens are brought back to earth. The book, read as an adult, is an odd pastiche of many things-- space-faring vampires, weird science that points to latent vampirism in all life forms, an explicit sex-vampirism link, and some half interesting notions of justice and rehabilitation. The first 70 or so pages are genuinely gripping and still pretty interesting. Unfortunately, after they meet Fallada and once the characters start exploring his backstory for more than illumination of the nature of the aliens, the pace of the book starts to drop. By the time that they end up at the Sekret Lair of Count Geijerstam and his benevolent vampirism, the book is fully mired in a soft porn S&M philosophy mush pie. Midway through the book it seems clear to me that Wilson was much more interested in his ideas than he was interested in his plot or, possibly, his readers.
Wilson himself is an interesting character, as a little bit of research proves. He was one of writers most identified with the Angry Young Men and he started his career doing philosophy/lit crit with a special interest in the role of the outsider. (Somewhere out there, I'm sure that there is someone smarter than me who is horrified that I heard about Wilson as a result of reading
The Space Vampires, but there you go.) After that point, he apparently got more and more involved in mysticism and different states of consciousness and started with the first footsteps on the path that would lead him towards writing sexy supernatural supermarket potboilers.
There is apparently also a film based on this book, which I can (somewhat thankfully) say that I haven't seen. Amusingly, on a Colin Wilson fan website, there is also an outline for
Space Vampires 2 which gives you some idea what the problem was in the second half of the first installment.
I'm not sure that I could recommend this to someone who doesn't have the same shared history with the novel. It might make an interesting digression for a reader interested in the vampire in all its forms. Probably one of the best things about the book is the meaning that Wilson attempts to beat out of the myth. It probably also has some reasonable kitsch value, if you like that sort of thing.