This book is a rough adaptation of the first four episodes of the classic science fiction TV series Space: 1999. While it is very well written, it doesn't really do any of the four episodes much justice, given the relatively short length of the book; the episode "Black Sun" barely gets two chapters. The book does do the TV series one better and explain the disappearance of a visitor from Earth who showed up in the first episode and was never seen again. This is your standard TV adaptation. The TV series itself has a bit of a cult following, but never came close to gaining the beloved status of Star Trek or Doctor Who. It's an enjoyable book for sci-fi fans, particularly if they remember the original series.