I have read all three books, and I must say I LOVE this series. Granted, the story is broken up into three parts, but that's ok NOW that all three books are available LOL!
In Book 1 we are introduced to Sloane and Kat. He is your typical Alpha male, but that just adds to his HAWT-ness. And Kat is a STRONG female lead without being off-putting. It also introduces us to most of the characters that will appear throughout the series. I really enjoyed the level of intrigue and suspense surrounding Kat's past. The sex scenes are intense and graphic. It does not have any real BDSM, though there are scenes where the boundaries of someone who grew up very "vanilla" are pushed. For me that's a plus because I, personally, am not into BDSM - in real life or in the books I read - but if that's what you're into, you won't find it here :)
Someone complained that this book's ending happened in the middle of a scene, but I think it's because the author meant for it to be cliffhanger-ish. Book 2 picks up RIGHT where 1 leaves off, so I would recommend - if at all possible - get all three books before you start reading them. Which BTW, I have read all three books at least 5 times :)
In the end, I hope you agree that it is a wonderful love story of two broken people finding each other and helping each other heal.