Which innovative book packaging format, introduced in the 1930s, revolutionized accessibility to classic literature by making quality books more affordable for the average consumer?

The publishing industry has seen numerous innovations in how books are presented and packaged to readers. From dust jackets to special editions, the physical presentation of literature has evolved significantly over time. This trivia question explores a groundbreaking packaging innovation that changed how readers interact with certain literary works.

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Penguin Paperbacks with their distinctive orange covers and standardized format
Folio Society's leather-bound collector's editions with slipcovers
Random House's first audiobook cassette collections
Barnes & Noble's illustrated hardcover classics series