Hawke and Sienna's story has been building up since pretty much the beginning of the series. So of course it's one readers have been waiting for a long time. I thought that for the amount that this story was built up there was every possibility that this book would not live up to expectations. I can see where some people might feel this way, but I really loved the book and as I got closer to the end I thought of how much was packed into it. 
 Besides the Hawke and Sienna dance going on Nalini Singh also throws in a relationship between Walker (Sienna's uncle) and Lara (SnowDancer's healer).The building of this relationship was much more subtle and was a nice contrast to the explosive (literally) relationship between Hawke and Sienna. 
 Things with the Psy come to a head. War is on the horizon. What was started in Play of Passion with the Psy monitoring the SnowDancer territory finally comes to a head. Sienna's X ability may be a major player but it may also be the thing that undoes her in the end. 
 I liked that despite the definite age difference between Hawke and Sienna, she reads as pretty mature. She was put through a lot in her time in the PsyNet and had to grow up fast. It was sweet to see that their courtship was comprised of Hawke giving Sienna back a little of the childhood she missed. 
 There are big things on the horizon for the Council. The fight between certain Psy Council members and the changelings may be holding right now, but I don't think it's over for good. 
 Nalini Singh has managed to write a very strong series. Even the books that haven't been my favorite have still been a compulsive read that's been hard to put down. I'm excited to see where she takes things next.