Which innovative book packaging format, introduced in the 1930s, revolutionized the publishing industry by making literature more accessible and affordable to the general public?

Book packaging design has evolved dramatically over the centuries, occasionally revolutionizing how we interact with literature. From dust jackets to digital covers, the 'packaging' of literature influences our perception before we read a single word. This trivia question explores a landmark innovation in book packaging that changed the publishing landscape and consumer reading habits. Test your knowledge about how design innovations have shaped the literary marketplace!

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Penguin Paperbacks with their distinctive orange covers and standardized format
Illuminated manuscript bindings with gold leaf detailing
Leather-bound subscription series with marbled endpapers
Folio Society boxed editions with original commissioned artwork