Keep the analgaesics handy, because that man is in full flow again.
If you have read anything else by him, you will know what to expect. If you haven't, then beware. All the words make sense. All the sentences make a vague sort of sense, the paragraphs - forget it. The story, however, seems to hang together despite the strangeness of the style - probably because of the strangeness of style.
I would normally say that you should read the first two as this is the third of a series, but even though I have read them in order, I doubt that it would really matter.
I was brought up with the so-called new wave of U.K. Science fiction writers: Ballard, Moorcock, Aldiss and even though I love them and the more trad U.S. writers, like Scott Card, Niven and Clarke, this guy has become my number one author of sf. This proves to me that I was right.