For what it's worth, I enjoyed this one more than Incubus Dreams. Unfortunately, other than a few random occurances, the entire plot of this book can be summed up in one line: Anita talks to everyone to find out more about the Ardeur.
By my best estimate, over 7/8 of this book is either Anita talking to someone (who you may or may not remember - I still can't place Clay and Graham in any of the prior books)or having sex with them...if you skip the monotonous dialogue and the uninspired orgy, you're left with about 3 chapters of story, and I use the term loosely.
On the up side, LKH does seem to be trying to tie up all of the unexplained metaphysical crap she's tossed at readers for the last three books, so that offers a bit of hope that maybe, just maybe, she's picking up the story again...of course, since I stopped buying them (three cheers for the library) after Cerulian Sins, I might be a bit more forgiving.
Overall, this book falls into the same trap as the last few...it has the odd few interesting plot chunks and ideas, but they're barely dealt with and certainly not developed to any reasonable conclusion.
Worth a read, but only if you really don't have anything better to be doing.