I should start by saying that I enjoy stories where faeries are darker and more malevolent, so this was just what I was looking for. I also need a believable, sympathetic protagonist, and I got that in Megan Chase. There are quite a lot of stories out there about a half-human/half-fae getting involved in faery politics, and Iron King is one of the best I've read. 
 The story flowed well, and was one of the few that I've read lately where the ending didn't feel rushed or thrown together. 
 Loved the characters (got to love a book that throws in Robin Goodfellow), and there are definitely enough questions left unanswered to fill more books. At the same time, the ending was satisfying and I didn't feel left in the lurch. I liked the way the author incorporated belief and faery power, and the changes our world makes in the Nevernever. 
 This is a YA book, but I would recommend it for any readers who love stories about faeries.