You found every single hidden number. This is a real achievement requiring a keen eye and the ambition of a professional detective. Not many readers get to access this secret area. And because of that, I would like to offer you a very special gift:
A pen-drawn (not printed / not digital – real pen on paper) illustration from Javi, the illustrator of Legacy of the Inventor, with a greeting from him and myself! This will come at no cost to you and be sent to you via regular mail. Would you like that?
If so, please fill out this form (ask your parents or a guardian to help you). You will receive an email with a confirmation link, so I have some means of contacting you.
All the best,
J. I. Wagner