Which retail innovation, launched in 1995, revolutionized book discovery and purchasing by introducing the concept of 'collaborative filtering' to recommend books to customers based on their previous purchases?

The book retail landscape has undergone dramatic transformations in recent decades. Independent bookstores, chain retailers, and digital platforms have all played crucial roles in how literature reaches consumers. This trivia tests your knowledge about a significant retail innovation that changed how readers discover and purchase books, creating ripple effects throughout the publishing industry.

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Amazon's 'Customers Who Bought This Item Also Bought' recommendation engine
Barnes & Noble's 'Discover' in-store kiosks
Borders' 'Personal Book Scout' membership program
Book-of-the-Month Club's digital preference algorithm