Which innovative pricing strategy, introduced in the 1930s, revolutionized book accessibility by making quality literature affordable to the average reader?

The publishing industry has evolved sophisticated pricing strategies that balance artistic value with market demand. From premium first editions to budget paperbacks, the way books are priced reflects complex decisions about audience, prestige, and accessibility. This trivia question explores a notable pricing innovation that changed how readers access literature. Test your knowledge of the business side of books!

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Penguin's uniform pricing of paperbacks at sixpence (the price of a pack of cigarettes)
Random House's subscription-based 'Book of the Month Club' premium pricing model
Doubleday's 'loss leader' strategy of selling classics below cost to drive bookstore traffic
Faber & Faber's tiered pricing based on page count and production quality