Which groundbreaking retail analytics technique did Amazon first implement that revolutionized book selling and is now standard practice in the publishing industry?

In the world of publishing and literature, data analytics has revolutionized how books are marketed, sold, and even written. Major bookstore chains and online retailers now employ sophisticated analytics systems to predict bestsellers, optimize shelf placement, and personalize reader recommendations. Test your knowledge about the intersection of literature, retail analytics, and consumer behavior in the modern publishing industry!

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Collaborative filtering for personalized book recommendations based on previous purchases and browsing history
Heat-mapping technology that tracks which book covers attract the most visual attention in physical stores
Sentiment analysis of handwritten book reviews to determine optimal shelf placement
Dynamic pricing based on the literary awards won by authors in the previous fiscal quarter