Easily my favorite book so far of 2012. 
 I loved this book. I usually don't write reviews, but I had to with this book/series.In trying to convince a few friends to read this book one of them pointed out that some reviews here at Goodreads compared the male lead, Daemon, to Edward Cullen. Which makes me thing that the people who put that in their reviewss are either a- ridiculously non-literate, b- have only ever read the TWL series and then this one, or c- need medication. Daemon Black is about as far from Edward Cullen as you can get. Seriously. If I had to compare him to another character I would compare his outer personality to Nick Ryves from Sarah Rees Brennan's Demon Lexicon series. Until you read the extra's and the prequel novella (which should definitely be read second because the world isn't really set up in "Shadow") you don't truly know much about what Daemon really thinks or feels, and he tries very hard to keep those things hidden from the heroine, Katy. 
 Oh, Katy. I kinda want to call Katy spunky, but I think she's be highly offended if I did. She is amazing. Just very real and strong and full of sass. Basically, I wish I was that awesome when I had been 17. Of course I want to smack her & Daemon both a good bit of the time, but that's kinda the point. The sexual tension between these two is PALPABLE. And if something doesn't give in Onyx, I'm afraid one or both of them might explode. Literally. 
 Read these books. I'm babbling, but seriously - read them.