Which publisher first introduced the modern mass-market paperback book format in 1935, making books more affordable and accessible to the general public?

Throughout publishing history, certain innovations in book packaging and presentation have revolutionized the industry and how readers consume literature. From paperback formats to dust jackets, special editions to audiobook packaging, these innovations have shaped both the business and art of literature. Test your knowledge about a groundbreaking product packaging innovation that transformed how we experience books!

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Penguin Books (founded by Allen Lane)
Harlequin Enterprises (founded by Richard Bonnycastle)
Pocket Books (founded by Robert de Graff)
Bantam Books (founded by Walter Pitkin)