Which retail innovation in the 1450s dramatically transformed the distribution of the Bible, making it the first mass-produced book in Western history?

Throughout history, religious texts have undergone various forms of 'marketing' to reach wider audiences. From hand-copied manuscripts to mass production, the journey of sacred texts represents one of the earliest examples of product distribution and innovation. This trivia focuses on a revolutionary retail innovation that transformed how religious texts were disseminated to the masses, creating one of the first 'bestsellers' in human history.

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Gutenberg's printing press with movable type
Franklin's subscription-based publishing model
The Vatican's illuminated manuscript production line
The Medici family's cross-continental book distribution network