Nine-year-old Frank Hardy’s substitute teacher for the week, Ms. Yung, came into the room, a big smile on her face, and said, “I’ve just come from the principal’s office, students. You’re getting a new classmate! He used to go to the school where I taught last year, so I already know all about him.”
Frank leaned over to his friend Callie Shaw and whispered, “Whoever it is must be really something.”
Just then a boy appeared at the classroom door. He was dressed in a knit shirt, jeans, and sneakers. He was holding a green backpack in his left hand....