When the letter E is injured, O tries to do its job in this hilarious and educational children's book that's" chock-full of inventive letter-play" ( The New York Times ).It's an E-mergency! The letter E took a tumble and the only way to get her back on her foot is for people to stop using her. But who can take her place? The other letters have to make a decision ASAP. Z is too sleepy and Y asks way too many questi...