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by walterbell 3938 days ago
Gather data on search queries and highlighted phrases for books? There is value in knowing which subset of the corpus is more valuable.

Apple acquired a "Pandora for Books" recommendation startup which had permission from publishers, who provided text for indexing, http://www.businessinsider.com/apple-buys-booklamp-2014-7 . Their machine classification made it possible to search books for topics whose words were not present in the book.