Which e-commerce innovation first introduced the 'one-click ordering' system that revolutionized online book purchasing and was later licensed to other retailers for $1 million?

The book retail industry has undergone massive transformation in the digital age. From traditional brick-and-mortar bookstores to sophisticated online platforms with recommendation algorithms, the way we discover and purchase literature has fundamentally changed. Test your knowledge about the e-commerce revolution that has reshaped how authors reach readers and how readers find their next favorite book.

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Amazon's 1-Click patent (1999)
Barnes & Noble's Express Lane (2001)
Borders' QuickBuy System (2000)
Book Depository's InstantPurchase (2004)