Which retail innovation, introduced by Penguin Books in 1949, revolutionized Bible distribution by making it significantly more affordable and accessible to average consumers?

The publishing and distribution of religious texts has evolved dramatically over centuries, with technological and business innovations reshaping how spiritual knowledge spreads. From ancient scrolls to digital apps, religious publishing represents one of the oldest and most resilient product categories in human history. This poll explores a pivotal moment in the retail innovation history of religious texts that dramatically increased accessibility.

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The paperback Bible, which reduced production costs by over 70% compared to traditional leather-bound editions
The subscription-based Bible delivery service that allowed monthly payments instead of a large upfront cost
The illustrated children's Bible designed specifically for Sunday School retail distribution
The interlinear Bible with original languages and translations side-by-side for scholarly consumers