Leo's book, with his name on the cover.
One of Maceo's adventures.
Serena's book, with her name on the cover.
Cody and Little Hawk's book, with their names on the cover.
A coloring book. Print it, or color it in the app.
A puzzle book of mazes.
A puzzle book of paper games.
Ask for the next one and the same heroes come back, in the same style, for a new adventure. Every book can be printed at home, and you can edit any page you are not happy with.