So, I rushed out and got it! And it did not disappoint. It is chock full of fantasy allusions both general and specific. For instance, the book starts with a map. :D And there is a babymouse daydream sequence in which she has huge, hairy hobbit feet. Ha! What is this dragon that Babymouse has to overcome? MATH! The Fighting Fractions, of which Babymouse is the newest member, must overcome the Owlgorithms to win back the Golden Slide Rule!
I liked the theme of the book -- it was very encouraging, but it was so tongue-in-cheek, so silly, that it wasn't cheesy at all. Two thumbs up for Babymouse #11!