I am currently reading my way through a long list of science fiction and fantasy titles. (http://www.npr.org/2011/08/07/138938145/science-fiction-and-fantasy-finalists if you are interested in the list).
This installment meanders a bit, as it juggles multiple story lines, plus lessons in architecture. Thomas "Oh was that your Tiger tank?" Nightingale gets to show why he's the teacher and Peter & Lesley are the apprentices. I particularly enjoyed Toby's increased role in this book, being Peter's magic detector (the yap-o-metre) and camouflage (a man with a dog is virtually invisible, apparently).
Peter has matured since the first book. Lesley gives him a hard time, needling him about why he and Beverly Brook aren't sleeping together yet. In the first couple of books, Peter would have jumped in first and thought things through later, but he has learned to think with his big head and is suitably cautious. After all, if your relationship with a goddess goes pear-shaped, you know who is going to suffer most (and it won't be Beverly).
I'm still enjoying the effortless multicultural and inclusive cast of characters, however don't imagine that I have no criticism! I'm not wild about the Faceless Man as an antagonist (although I did enjoy Peter's reference to his lab as the Strip Club of Dr. Moreau). But, having read to the end of this volume, how can I doubt that I will read the next to see the next event in the drama?