Obsidian.

This book, by Jennifer L. Armentrout, is breath-taking. Daemon and Katy have so much passion and lust between them, even though Daemon is a total ass. But there's more to Daemon. He isn't the typical teenage jerk-wad.
First off, there's glimpses of a sweet, kind, Daemon. Shocking, I know. 

Secondly, there's something.. off about him. Him and his sister, as a matter of fact. Katy is determined to find out what's really going on, even though she knows once she does, her life will never be the same.
I give this book 5 stars out of 5. It's definitely on my top-ten list of drool-worth books.

Check out her blog, to find more amazing books, and teasers.
 http://www.jenniferarmentrout.com/blog/