I've searched in this thread and I don't find any posts about this books. It seems that there are some growth scenes, as you can read the description: "Fifth-grader basketball player Sarah Bardin has had it with being short. But when a crazy rat-woman grants her the wish of being tall, Sarah gains a huge new perspective on height."
http://www.amazon.com/Monster-Jam-Sc.../dp/0590098969
Nice cover too.
Sadly, no previews/revies in the web. Has anyone info about this book?