I sort of feel like the thing that dissatisfied me about this book is a clear sign that I'm doing it wrong. So first off: if you are looking for hot gay BDSM and plenty of sex, this book is totally worth your time. It's sexy all the way through, well written, and intense, while also being really smart and refreshingly straightforward about polyamory and consensual kink (I'd class it more RACK than SSC just because slave contracts lend themselves to no-limits-allowed scenes). 
 So why four stars instead of five? Because there's a premise here -- that contract slavery is legal -- that feels like it ought to have a lot of other effects on how the society works, and this story doesn't really touch that. It's contemporary-except-this-one-thing, when I'd personally find it more interesting (and hotter) to see how different a contemporary setting with legal, consensual slavery would be. The story never zooms out far enough to explore those effects. I'm a world building nerd who's also kinked pretty hard for broad-scale power dynamics, so I wish there had been more going on there. 
 Still an awful lot of hotness packed into this package, though.