Proven Guilty by Jim Butcher

This book is another great entry in a series that keeps getting better and better. I am starting to realize that something more than case-of-the-week links these stories, but it grows organically out of compelling mysteries each time. This time, Harry's asked to investigate a black magic practitioner and something going wrong in the Faerie courts. As it turns out, these cases are linked, and the black magic practitioner has a history similar to Harry's own. Harry, as usual, narrowly gets by with his wits, his power, and a little bit of help from more-or-less-reliable allies. I enjoyed this story and I'm eagerly looking forward to see how many of the new questions (like Mab's supposed madness) pan out.