Well, to start with, you have to have read Books 1 (
Keeping It Real) and 2 (
Selling Out). And there has to be a Book 4!
Book 3 just leaps straight in, taking up exactly where Book 2 left off - in fact, I cannot imagine that Justina Robson even got up from her computer between finishing Book 2 and starting Book 3.
So - we start in Daemonia with Lila and her two husbands, Zal and Teazle. We don't stay there long, though. It's fairly obvious where the book is headed. The previous books were set in Alfheim, Thanatopia, Noomenon and so, finally, Lila reaches the land of Faery.
The 'plot' is too simple - rid Otopia of a plague of Moths - or Mothkin - creatures related in an animal way to the faeries. To do that, Lila must go to the land of Faery. But, of course, it's nowhere near that simple.
The same characters are here - Tath, Poppy, Viridia, Malachi, Sorcha, Zal (of course) and Teazle, Thingamajig and all. But more and darker sides of their natures are revealed, and more mythical characters come in. Actually, mythical is probably the wrong word - symbolic characters would be better, creatures from the beginning of Creation. They could almost be made of 'dark matter' and 'dark energy'.
This is such a strange book. It is full-on, non-stop, in the same way that the previous books have been, but it continues to get darker, harder, more elliptical, much deeper. It seems that the book is becoming more and more a fantasy novel, but it never gets there - where demons can hunt with 'Matter Vaporisators', magic can't really get a look in.
That's what's different about this series. Although ostensibly we are dealing with elves, demons, faeries, imps and all sorts of strange creatures, it's all tied together by the earthly realm of Otopia; you always get the sense there is some 'hard science' lurking under it all. It's not yer average 'let's zap the aliens' sci-fi tale and it certainly isn't sword and sorcery (although there are plenty of swords, along with the Matter Vaporisators) - so, maybe it's science fantasy. Whatever - it's a damn good read. Roll on Book 4!