Maybe verging on the 4 stars, but a pretty good romp. I like the introduction of Kitty's POV, though I still lag a bit while reading Bartimaeus' bits.
(I
like the idea of the footnotes, but in practice, it can be a bit hard to divide attention between the main page and the witty asides at the bottom. Somewhat similar to [b:Jonathan Strange and Mr Norrell|8466224|Jonathan Strange and Mr Norrell|Susanna Clarke|http://ecx.images-amazon.com/images/I/51Ta3OgncfL._SL75_.jpg|3921305].)