When it comes to stirring up a little excitement in class, Otis Spofford knows just what to do. He can turn a folk dance fiesta into a three-ring circus, or an arithmetic lesson into a spitball marathon. Even his friends George and Stewy can't keep up when it comes to Otis's mischief.

Best of all, Otis likes teasing Ellen Tebbits. She's so neat and well-behaved—there's something irresistible about making Ellen mad! But when Otis's teasing goes too far, he feels sorry . . . and then nervous. For now Ellen isn't just mad . . . she's planning something!

Beloved author Beverly Cleary brings real understanding to this wonderful story of a "bad boy."