Question

is it possible to memorise an entire book?

Answer 1

yes it is truly possible that you can memorize the entire book but if you have to do this so you have to give time to the book you have to understand the concept of the book understand each and every line then you will be able to memorize the book

Answer 2

May be possible for someone. But it is better if you understand the whole book. But if you want then you can try once by yourself.