Which innovative product packaging decision by Penguin Books in the 1930s revolutionized reading culture and democratized literature?

Product packaging isn't just about protection—it's an art form that tells a story. In the publishing industry, book covers and packaging innovations have transformed how we experience literature. From dust jackets that became collectible art pieces to experimental book designs that challenge the very concept of a 'book,' packaging decisions have profound effects on literary works. Test your knowledge about a revolutionary packaging decision that changed how we interact with certain literary works.

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Introducing standardized paperbacks with uniform design at sixpence each (significantly cheaper than hardcovers)
Creating leather-bound collector's editions with gold-leaf pages
Developing the first audiobook packaging with vinyl records
Pioneering the first waterproof book covers for bathtub reading