Which packaging innovation of the 1930s revolutionized access to literature by allowing readers to carry multiple books in pocket format with distinctive color-coded covers?

Throughout publishing history, innovative book packaging has transformed how we experience literature. From medieval illuminated manuscripts to modern interactive e-books, the physical presentation of literature has evolved dramatically. This poll tests your knowledge about a revolutionary packaging innovation that changed how readers interact with certain types of books, making literature more accessible to broader audiences while solving a practical reading challenge.

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