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Publishing Public Domain Titles
February 20, 2011 -- In order to provide a better customer buying experience, our policy is to not publish undifferentiated versions of public domain titles where a free version is available in our store. We consider works to be differentiated when one or more of the following criteria are met:
• (Translated) - A unique translation
• (Annotated) - Contains annotations (unique, hand-crafted additional content including study guides, literary critiques, detailed biographies, or detailed historical context)
• (Illustrated) - Includes 10 or more unique illustrations relevant to the book
For more information about this policy, please visit Publishing Public Domain Content