A few months ago I read the first book in the series which I described as “It was all building up to something which never actually happened. I'm told that there is a follow-up sequel being released in a couple of months. That might be interesting to read; if only to find out what all the build-up was about.” I said the same about the second book.

This is the third book in the series... I say "series"; each book is only really a few chapters - the series together barely makes up what I would call a "book". All together this series/book is a sequel to a sequel. The original prides itself on being "hard" science-fiction. This book (whist rather readable) is really firmly in the realms of science fantasy.