Which innovative book packaging technique, first popularized in the 1930s, revolutionized the accessibility of classic literature and helped create what is now considered the first modern 'portable library'?

Book packaging and design has evolved tremendously throughout literary history, becoming an art form in itself. From minimalist classics to elaborate special editions, publishers have used innovative packaging to attract readers and enhance the literary experience. This trivia question explores a groundbreaking moment in book packaging design that revolutionized how readers interact with literary works.

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Penguin's color-coded paperback system with standardized design
Limited leather-bound editions with gold leaf embossing
Dust jackets with artistic illustrations by famous painters
Folio Society's slip-cased hardcover presentation format