Great world building and characters. Think Harry Potter's magical world mixed with the dark mind of Clive Barker. The Brethen is a crazy mix of interesting characters fighting a pure evil warlock. The romance part of this book was only OK, but I'd read more in this series without a doubt. There is a plot device that requires sex to energize ones powers which was about the only thing in the world building that I thought was over the top silly, but this is not an erotic book. I'd rate the sensuality around really warm or maybe just shy of hot.