I finished reading the book yesterday. It is odd that even though I had the feeling a few times that it was not quite a "real" book (too adolescent in tone, sometimes, too much like something I would read in a graduate school workshop in tone), I lapped it up. It was very much like those childhood books I used to fall into, and really, which make up the subject matter and the background of this book.
Grossman has really hit a nerve on this one. I think that there are lots of people like me who wish they could read as they did when they were children, engrossed in fantasy series like the Narnia books, which I loved and still love, or the Fellowship of the Ring.
There is no doubt that he is very good at plotting and also that the ending of this book is stronger than the ending of The Codex. I can definitely see movies coming out of these two books, big Harry Potterish blockbusters, but perhaps it is too tongue in cheek for Hollywood to take up.
It makes me want to scrounge about for more fantasy. I would love any suggestions!