An analysis of Tolkien's books

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Appearance of new words
in the Silmarillion, the Hobbit and the Lord of the Rings
There are a lot of words, characters and locations in Tolkien's works. This is an attempt to visualize where in the books new terms and words appear. In order to enhance patterns pages where at least 25% of the words are new are shown red. Pages with less than 25% new words are shown on a color scale from red to blue.
The Silmarillion
The Hobbit
The Fellowship of the Ring
The Two Towers
The Return of the King