A book about demons living amongst humans - if you're a Supernatural fan, you'll probably like it.
The main character, Muse, is a "half-blood" - half human, half demon - with a touch of the TSTL. She's not a damsel in distress, so she's somewhat forgiven. She just tends to throw herself at the Prince of Greed, a full demon not known for his charity (as though any demon would be).
There's also a half-blood assassin, who, well, what I had here was kind of a spoiler, so I took it out.
It's the classic story of opposites attract, with some needless twisting, but overall, a pretty good read. It's not one I'm likely to read again, but I will check out the rest of the series.