This book is extremely fast-paced. It's non-stop and Harry Dresden shows himself as a guy with extreme endurance. He really gets beat up on this one, but he always gets up in the end. It has the two best potion recipes of all times: the Stimulant “Pick me up” potion (base liquid is coffee) and the Blending potion, to make him imperceptible to a werewolf. I had fun!