body: I want to make an Android app based on [Chanakya Niti](https://www.buffacompany.in/2020/05/chanakya-niti-in-english-read-online.html?m=1) for that I definitely need a source. I have a book for that but my confusion is that it says you can't copy the content in any form. How can any publisher claim copyright on the teachings of person who lived in India centuries ago? The confusion is that many people are saying that it's in the public domain so you can make an app, but the source books are saying you can't copy the content.
  
  
  The second confusion is that a few people have said that you can't make money out of it, but the developers are already making money by monetizing their app. I want to make more money by putting it in the "in app-purchases" category, so why can't I do that?
  
  
  
title: If work done by Chanakya, like Chanakya Niti, is in the public domain, then how can some people publish and sell books?