Fool Moon is the second book in the Dresden Files series. Picking up after events from Storm Front, Harry finds himself once again in the middle of a bad situation involving some beastly murders. Naturally, being the only wizard-detective, he must get to the bottom of whatever supernatural phenomenon is causing these murders to occur.

Fool Moon is, as it's name implies, about werewolves. What's neat about Jim Butcher's take on werewolves and lycanthropy is that he separates it into three types of werewolf. At first, I thought it was a bit contrived, but the story makes a convincing case for them, and treats each as different forms of the classic lyncanthropy-addled beasties. Once again, I found myself about half-way through the book unable to put it down, and reading"one more chapter" until the book delivered its satisfying conclusion.

Highly recommended for those who picked up the first book, Storm Front. Fool Moon develops more of the "Dresdenverse", and begins fitting the pieces together for how all of these supernaturla entities co-exist (or don't, as the case may be). I'd recommend reading them in series, as there is an overarching plot arc in the first six books.