Ramona Quimby isn't really a pest. The people who call her a pest are always bigger and so they can be unfair. It's just that Ramona is not a slowpoke grownup. She is a girl who cannot wait. Life is so interesting she has to find out what will happen next.
What happens next in this story? Ramona enters kindergarten! She likes most parts of it -- singing that song about the "dawnzer lee light" every morning, bringing her doll Chevrolet (named for her aunt's car) for Show and Tell, boing-boinging Susan's corkscrew curls during recess. Yes, school is fun... until something happens and Ramona almost becomes the world's first kindergarten dropout!