Which packaging innovation revolutionized the distribution of Bibles in the mid-20th century, making them more accessible to military personnel and travelers?

Religious texts have evolved not just in content interpretation but also in their physical presentation. Throughout history, publishers have innovated in packaging sacred texts to meet the changing needs of spiritual communities. From ancient scrolls to modern digital formats, the way religious materials are packaged influences accessibility and practice. This trivia question explores a significant packaging innovation in religious texts that revolutionized their distribution in the 20th century.

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The Thomas Nelson Compact Bible with synthetic leather binding
Gideons International's compact vinyl-covered editions for hotel rooms
Oxford University Press's India paper Bibles with gold-edged pages
Zondervan's first mass-market paperback New Testament