Google's Book Search service offers searchers free downloadable
PDF files of classic titles like Dante's "Divine Comedy",
Sir Isaac Newton's "Principia", Ralph Waldo Emerson's "Essays",
the complete works of William Shakespeare, and Aesop's "Fables",
as well as other books no longer under copyright (search for
example for "The Works of William Shakespeare").
The download button for PDFs is unfortunately only available for
public domain books, and even some of those have yet to be enabled.
http://news.bbc.co.uk/2/hi/business/5297412.stmhttp://blog.searchenginewatch.com/blog/060830-090743-J.
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