There's trouble at the library! A vandal has removed words from the books and scattered them about. To repair the damage--and catch the culprit--the librarian will have to enlist the assistance of the famous word detective William Word Sleuth. Readers will learn how to recognize unfamiliar words using picture clues, definitions, common letter combinations, and more! The Building Blocks of English series helps readers master the fundamentals of the English language--from individual letters to advanced reading and writing skills--through fun and engaging graphic storytelling. Play-along questions make readers part of the story, and "show what you know" tests reinforce what they've learned.