This book is extremely readable and fast paced. The idea of magic in a regular world is always good for a laugh and I enjoyed reading about Dresden.
Magic is reasonably well thought out in this text, but I would have loved to see more about language and spells. The verbal part to spell slinging just seemed to arrive out of nowhere and I would have loved to know if those where Harry's actual spell activation words or just random Latin.
My only issues with the text is the way he keeps 'everything' to himself. Seriously this guy couldn't tell Murphy one little thing? It's not as though he has to keep magic quiet or he wouldn't be allowed to openly advertise and practice magic, so why can't he say to Murphy? 'sorry, but if I do this spell or tell you that, I'm getting killed'.
My other problem was Morgan. There seemed to be no reason for this guy to be all over Dresden like a rash. If Harry had killed his pet dog or something, then I could understand the zealotry, but he just came across like an obsessed nitwit. And yes I know that fundamental types exist but he really seemed to be 'anti-Harry' and not 'I AM THE LAW'.
But niggling points aside, highly readable and good book, will certainly read the next one.