By Gene Luen Yang and Mike Holmes
Year published: 2015
Welcome to Stately Academy, a school which is just crawling with mysteries to be solved! The founder of the school left many clues and puzzles to challenge his enterprising students. Using their wits and their growing prowess with coding, Hopper and her friend Eni are going to solve the mystery of Stately Academy no matter what it takes!
Book 1 of the Secret Coders series.
Book description from publisher.