Eddy Shade and the UnSeelie Court

It has been months sense Detective Eddy Shade was thrown into the world of magic, but he has finally begun to settle in. He has even started to work cases with Carl. However with the onset of winter has also come new problems, mainly a group calling themselves the UnSeelie Court. But who are the UnSeelie, and what link do they have to the man that Eddy saw Swan kill over the summer? More importantly, what price will have to be payed for the answers?