Which packaging innovation, introduced in 1935, revolutionized the book industry by making literature more affordable and accessible to the mass market?

Book packaging has evolved dramatically over centuries, influencing both sales and reader experiences. Modern book design and packaging strategies employ sophisticated marketing techniques to attract readers in increasingly competitive markets. This poll tests your knowledge about a revolutionary book packaging innovation that transformed the publishing industry and consumer reading habits in the 20th century.

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Paperback books (Penguin Books format)
Dust jackets with plot summaries
Hardcover books with embossed covers
Book club edition packaging