Here's an interesting 2009 Rebecca Caudill Nominee - Oh Rats! The Story of Rats and People by Albert Marrin. Did you know that a rat can colapse its skeleton to squeeze through a hole the size of a quarter? Its true! I learned a lot about rats (even stuff I didn't want to know!) in this book. My favorite chapter was about rats and their role in the plague. Check it out...and prepared to be grossed out!!!