Eddie is a tiny green bug who loves to read and who lives behind the chalkboard in Mr. Wang's fourth-grade classroom with his parents, his 53 brothers and sisters, and his Aunt Min. But when Aunt Min goes to the school library and never returns, Eddie leaves the comfort of his home for the first time and begins the dangerous trek through the elementary school. After dodging running sneakers, falling books, and terrifying spiders, Eddie reaches the library, where he finds Aunt Min stuck on a desk with two broken legs! To top it all off, there's a substitute librarian who has terrible plans to close the library and turn it into a local testing center. No more books at all! Encouraged by the brave deeds done by small creatures like Stuart Little and Charlotte from Charlotte's Web, Eddie comes up with a plan to save the library -- a plan that requires all the courage one little bug can muster.