Bill Slawski explains Google's tool Popular Passages, which lets you create links between books and other publications based on shared passages and quotes. This is one of the most popular navigational
features of Google Book Search, which also includes such items as "a list of the 'key terms' that appear in the book with links to where they show up," and a "Google Map to places mentioned in the
books," notes Slawski.
Popular Passage is also useful for patent filings. And what does its popularity mean for Web search? More tools that do similar jobs of linking key terms and
passages in publications may be coming, says Slawski.
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