註釋
"The mind-bending new series from Gene Luen Yang! Welcome to Stately Academy. Hopper hates her new school. The kids are mean, the principal is scary, and there's something creepy about the building itself. For instance: why are the walls of Stately Academy covered in the number 9? Hopper and her friend Eni are determined to get to the bottom of it. But the mystery of Stately Academy has been programmed into its very stones, and it'll take two persistent programmers to figure it out! Hopper and Eni are about to become secret coders."--Page 4 of cover
