Which publisher first popularized the 'box set' format for literary collections, revolutionizing how multi-volume works were marketed and sold in the 1930s?

The world of book publishing has seen remarkable innovation in how literature is packaged and presented to readers. From dust jackets to special editions, the physical presentation of books has evolved into an art form of its own. This poll tests your knowledge about a revolutionary packaging concept that changed how readers interact with certain literary works. Can you identify the correct origin of this influential packaging innovation?

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The Limited Editions Club with their Shakespeare collection
Penguin Books with their color-coded classics series
Random House with The Modern Library series
Faber and Faber with their poetry anthology collections