Why the 1930s, you check with? The invention of Penguin paperback books, needless to say! This new mass industry demanded book covers for being equally easy to acknowledge and easy to breed. This design is so intelligent and trippy—tricking you into wondering you happen to be looking at the back https://medium.com/@BookIllustration/how-to-start-your-career-as-a-self-publishing-author-with-maple-publishing-279bb8d5a6f3