What is this book about?

A hard-working man used to sell books in trains for a living. He was satisfied with what he had. He knew the importance of education so he had enrolled his son in a English medium school as he had heard successful people travelling in AC coaches often speak in English.

One fine day on 21 March 2020 all the trains stopped running because of the nation wide lockdown in India. This man was jobless but he had somehow been managing to survive. As the books were lying in the house his son started reading those books. He would finish a book in 2-3 days and move on to another. The man was curious what was his son reading. So he used to ask his son "What is this book about?" His son would narrate the story in short.

Days went by and after two months he had heard about 40 books. He decided that from now on even after the lockdown is lifted he will first give any new book he was selling to his son and after his son reads the book he would ask him "What is this book about?"