Which famous publishing house revolutionized paperback book design in the 1930s with their standardized color-coded covers that helped establish their brand identity across different genres?

Book cover design is a crucial element in publishing that bridges art and commerce. A well-designed cover can significantly impact a book's sales and cultural impact. This poll tests your knowledge about the business and artistic decisions behind some of publishing's most iconic product designs. Do you know which strategic choices helped certain books become visual landmarks in literature?

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Penguin Books, with their distinctive orange (fiction), green (crime), and blue (biography) covers designed by Edward Young
Random House, with their red (fiction), black (mystery), and yellow (non-fiction) cover system created by Bennett Cerf
Harper & Brothers, with their purple (classics), brown (contemporary), and gray (reference) design scheme by W.A. Dwiggins
Simon & Schuster, with their blue (fiction), red (history), and green (science) uniform design approach by Paul Rand