One morning, a child named Jule Janke saw, pale with fright, that all the scholarly books in her bookshelf were gone. The solution to the mystery: a wandering rat has eaten the books and is now very clever. Jule likes this, as the rat does her homework and whispers answers to her when the teacher asks a question. However, true to the nature of wandering rats, the creature moves on. And on this very day, the school inspector arrives with a committee. Jule embarrasses herself terribly. This witty rhymed story enlightens all the small and large unwilling learners: Learning by oneself makes you smart!.