Ellen & Otis Series by Beverly Cleary, Tracy Dockray

Ellen Tebbits has a secret that she'll never share with anyone. That is, until she meets Austine—and discovers that Austine has the same secret! Soon the girls are best friends who do everything together—attending dance class, horseback riding, and dodging pesky Otis Spofford. But then Ellen does something terrible, and now Austine isn't speaking to her. Will Ellen be able to prove how sorry she truly is?

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. Best of all, Otis likes teasing neat, well-behaved Ellen Tebbits—until the day his teasing goes too far. Now Otis is nervous, because Ellen isn't just mad . . . she's planning something!