Augmented reality app store review

Hello everyone,

I am trying to publish an augmented reality app into app store. I have prepared physical book and the app is used to scan some pages of that book and view some of the images in 3D. The app was rejected with "apps cannot require users to purchase unrelated products or engage in advertising or marketing activities to unlock app functionality" because image markers (my book) needed for it. Should I add in-app purchase to buy the book(it is free at the moment). I have seen toys being operated with apps. Just trying to understand how they would solve this issue because similar to my case the toy needs to be bought/obtained separately.

Thank you.

Augmented reality app store review
 
 
Q