Which innovative recommendation feature did Amazon first introduce to the book industry in 1998 that revolutionized how readers discover new books?

In today's digital age, major online bookstores and literature platforms use sophisticated recommendation algorithms to help readers discover new books. These systems analyze purchasing patterns, reading habits, and user preferences to suggest titles that might interest you. How well do you understand the technology that's reshaping how we discover literature? Test your knowledge about the evolution and implementation of these digital literary curators!

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Collaborative filtering with the 'Customers Who Bought This Also Bought' feature
Text analysis algorithms that match writing styles across different authors
The 'Book Genome Project' that categorizes books by 32,162 thematic elements
Neural network systems that predict bestsellers based on first chapter analysis