Violet and Victor Small are twins on a mission: to write the best book in the whole, entire world -- together! Victor is reluctant, but Violet is determined, and soon the ideas can't come quickly enough. They begin to write a story about a hungry Bookworm who is eating all the books in the library. Thanks to Victor's brilliant ideas, Violet is able to save the day (and the library). This story-within-a-story is filled with good-natured sibling rivalry, and focuses on the spirit of cooperation, the satisfaction of a job well-done, and the magic of storytelling.