content: Runny Babbit: A Billy Sook is a collection of 40 poems about a Bunny Rabbit. Get it? You'd better, because every last page uses the same letter-switching joke. In lesser hands this would be too much, but Shel Silverstein -- the master of expressive line drawings and simple witticisms -- creates a work of constrained genius. Runny Babbit is a hilariously hapless but bold character who has adorable little adventures (My favorite is the poem about the "Ficken Charmer.") This will be best appreciated by the 4-7 year old set who love a good "spoonerism," but even though it's no "Sidewalk Ends" (what is?) it's a worthwhile read and necessary addition to any Silverstein collection.