Agreeing with those who said it's a bit reminiscent of The Curious Incident of the Dog in the Night Time, although for a younger audience. It is a fast paced story, and I think the audience will enjoy solving the mystery with the kids, although I'm not sure they have the clues to do so as much as they can follow along?
My peeve with the book is in its shape, and this is my new peeve. This is not a 400 page book, but the trim size is so small it makes it seem long. Its not pleasurable (to me) to read a small but fat book. Anyone know the source of this trend?