Not much to say beyond:
It's a good book, and I'm sure I'll read the others in the series (having started with #3, I may end up re-reading it when I get back to that point...).
It's magic and wizards meets crime fiction -- like Dresden Files but ... a little dryer and a little slower. It was definitely enjoyable and had a nice discussion on London :) I would recommend to people to whom the above brief description appeals.
THREE AND A HALF of five stars!
Also, I am happy to hear that they (London people) are planning on making a tv series from the books!