From the one and only Sandra Boynton comes a celebratory board book about a madcap crew of lovable birthday party crashers. You hear the door come crashing down--those birthday monsters are in town! Featuring Boynton's irresistible rhyming text and delightful illustrations, these creatures are going to wreak havoc in the most extraordinarily rude ways, making every celebration truly unforgettable! Five Birthday Monsters barge right in and yell, "It's Morning! Let's Begin!"