When you are preparing to come up with a film based on mythology it is obvious that you need to compile some facts and do take references from the past to bring authenticity. And it is a sacred epic like Ramayana such groundwork is much more needed.
The prestigious banner Geetha Arts owned by mega mastermind Allu Aravind has announced the big Ramayana with a budget of 500 crores. Few experts are suggesting they can take one book which will provide them with all the required inputs.
It is from the legendary Arudra. He wrote a book titled as Ramudiki Seeta Emautundi and in that he has compiled details from nearly 20 versions of Ramayana written across the world. So, this book may be useful for them to research and prepare the storyline.