Offers many free eBooks, especially older works for which copyright has expired. This link takes you to a collection of books from Classical antiquity, but try searching for any classical author.
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Featuring 600 original articles written by leading scholars, this resource goes far beyond the records of archaeology to make available what we know about the full social, political, religious, cultural and artistic legacy of this 5,000 year civilization.
The Oxford Encyclopedia of Ancient Egypt by 
A Companion to the Ancient near East by