There is nothing quite as exciting as earning your very first library card. D.W. has been waiting forever to be old enough to have her own name on a card, and the big day has finally arrived! She is eager to march right into the library and check out her absolute favorite book all by herself. But having a library card also comes with a lot of new rules and serious responsibilities. D.W. quickly learns that taking care of a borrowed book is much harder than it looks, especially when you are worried about every little scratch, spill, or bent page. Her determination to keep her beloved book perfectly safe leads to some incredibly funny situations around the house. Join Arthur the aardvark's spunky younger sister on a hilarious learning adventure as she discovers what it really means to be a responsible reader.