Superfudge by Judy Blume

He knows a lot of big words, but he doesn't know where babies come from. He's never heard of a stork, but he plans to be a bird when he grows up. He's Superfudge, otherwise known as Farley Drexel Hatcher. And, according to his older brother Peter, the biggest pain ever invented. Among other things. As fans of Tales of a Fourth Grade Nothing already know, nothing is simple for Peter Hatcher. He is far from overjoyed at the turn the family fortunes...