This is good as BDSM books and stories go. It has enough bite to tantalise you with and it's very easy to fall into their story.
This had nice elements that were different enough from other books about this lifestyle, the characters were written very believably and both came across as likeable and very readable. It contained just the right amount of mystery surrounding them to keep your hooked all the way through, throw in the drama towards the end and hey presto - all the great ingredients to make your eyebrows raise, your lips curve into a smile and your head to swoon over another sexy alpha male.
Having seen though that book 2 is this book but done in Nathanial's POV, I'm not sure I want to read that and may very well skip straight to The Training to finish their story.