I.Q. (a mouse) gets to go to the library to choose a book for the first time. He learns all about the wonders of the library (puppets! computers!) and learns how books are organized, and how to take care of them. But what he really cares about is finding the funny book the librarian read so he can take it home. We're all cheering when he finally gets the book he wants and gets to take it home and read "until his eyes water and his tail curls."