Billy Miller is a seven-year-old boy starting second grade with big worries. The story follows him through a whole school year as he navigates challenges with his teacher, his annoying little sister, a school project about the moon, and his love for his artist father. Each section of the book focuses on a different important person in Billy's life: Teacher, Father, Sister, and Mother. It's a warm and funny story about growing up, family love, and finding your confidence.