If I understand your project correct, the main advantage of other e-book for customers are the revocable access, ability to resell. From author perspective no censorship and no centralized company controlling the material.

My question is -
Isn't the revocable access and ability to resell are not actually a technical limitation but more of a company's operating business model. What if the concern companies open up the avenue down the line bowing down to the competition?

Definitely an interesting idea, but this idea looks novel not due to the current technical limitation which gets resolved through BlockChain

Your thoughts please...!