An unforgettable birthday celebration from Sandra Boynton! You hear your door come crashing down—those birthday monsters are in town! And they're going to wreak havoc in the most extraordinarily rude ways. What fun! From Boynton on Board, the more-than-20-million-copy-bestselling series of extra-big, extra-fat, and extra-fun board books, here is BIRTHDAY MONSTERS. Featuring Sandra Boynton's lively rhyming text and inimitable illustrations, this story about a madcap crew of lovable party crashers will appeal to kids and adults alike.