The Care and Feeding of Sex Demons by Angela Fiddler
Even if dealing with fairies and demons, The Care and Feeding of Sex Demons wasn't a typical paranormal romance, but a classic urban fantasy: the "menages" between human Cy, fae Patrick and sex demon August was a whirlwind of events, sometime so crazy packed that was almost difficult to understand what was happening; an example? when Cy is "feeding" August, for what I know of sex demon, that means they are having sex, but I had to read two times that scene and still am not sure they were having sex... it was more an impression that a detailed description, so if you are expecting to buy this novel for the hot sex... well maybe you have to change your expectation. But if you are searching for a crazy urban fantasy, with IKEA and McDonalds throw in the middle of it, humor and satira, well, then, this is your book.
I'm pretty sure this is part of a series, and indeed the whole book was like "viewing" an episode of a modern television fiction, those snarcky, but clever series that are the hit of the moment. I'm not really a fan of fantasy, or urban fantasy, but I'm a fan of complex characters, and all three of them, Cy, Patrick and August are the best example of multilayered characters.