Need help with app's rejection multiple times with same review guidelines of Duplicate content and Intellectual Property

We have published an app to show biblical information from a book "God's Word written in the stars" for all constellations and sub-constellations. This is not a star gazing app and we are not duplicating any content whatsoever. We are building the sky image, the constellation images by ourselves and the content is from the above mentioned book.

We have published the app 2-3 times but every time we get rejected owing to following design guidelines:

Guideline 4.3(a) - Design - Spam This app duplicates the content and functionality of other apps on the App Store, which is considered a form of spam.

Guideline 5.2.1 - Legal - Intellectual Property

Any help on this is much much appreciated.