Why the 1930s, you request? The invention of Penguin paperback books, obviously! This new mass industry demanded book covers to become equally quick to recognize and easy to reproduce. This design is so intelligent and trippy—tricking you into wondering that you are checking out the back flap on the book. https://bookillustratorsforhire.blogspot.com/2024/12/4-ideas-to-find-best-self-publishing.html