Why was a cheap paperback edition of the book printed after the Great Depression?

Why was a cheap paperback edition of the book printed after the Great Depression? Print Culture and The Modern World, clsas 10 histroy question answer

Question: Why was a cheap paperback edition of the book printed after the Great Depression?

Answer: After the Great Depression people went without work and had no money. To popularize the printed books and make it sustainable in the market, the Cheap paperback was used, so that people could afford and buy these books for themselves.