This one was not near as good as Hotter After Midnight. I'm not sure if it's the story or if I just didn't get into the characters as much. I definitely liked the shifter story (Hotter After Midnight). The story of the succubus in Midnight Sins was not as good, and maybe that's because I'm not that into the other sups as shifters and vamps.
I did like the fact that several questions were answered from the first book. That closed up a few things for me. I will read the next in the midnight series. If I don't like it as much as the first one, I'll stop with it.