Overall I enjoyed the book and I think it will be a great subject for a movie.
I found out at our weekly docent meeting that the person who is designing the set works in Los Angeles but actually lives here in Tucson (apparently commutes, a few days out there, a few days back here, or something like that). Anyway, he took lots of pictures of Reid Park Zoo to use as a template for designing the zoo set for the movie. It will be interesting to see once the film comes out if any of the zoo enclosures look somewhat familiar to me.