Wow, I'm seeing all of these reviews that thought it wasn't such a hot book, but I thought it pulled off what it was intending to do just fine. This is more along the lines of a "typical" rentboy story, where you've got a john who gets attached and a rentboy who doesn't want to get attached. This story just happens to also incorporate S/M into the mix with a Dom (the rentboy, Nick) who has seen emotions bleed over and cause turmoil before, so he doesn't let it do that anymore. Nick does what he believes to be the honorable thing for Spencer and puts rules in place to prevent that. 
 (view spoiler)[Only it's Nick who breaks the rules and then runs away from the emotion. (hide spoiler)] 
 The story is told entirely from Spencer's point of view, so we only see of Nick what he sees of Nick. Initially, we see the Dom who is training a new sub who's never played before, no attachment because they don't know each other. Eventually we see how close they become and how their relationship has changed. But we have to see how it wasn't that way initially to appreciate how it ends that way and how it got to that point. I wasn't bored at all, and it was still a spine-tingling read. 
 I might not have been quite as pleased with this story as I was the previous two, but it was still a thoroughly enjoyable read.