Which publisher first branded their books with a consistent, colorful design and the revolutionary slogan "Good reading for the millions" to make literature more accessible to the masses?

In the competitive world of publishing, brand slogans can make or break a book's success. One publishing house revolutionized marketing in the early 20th century with an innovative approach to branding paperbacks, making literature more accessible to the masses. This poll tests your knowledge of this pivotal moment in literary retail history that changed how we consume books forever.

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Penguin Books
Random House
HarperCollins
Simon & Schuster