Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
John Henry Pepper
Museum of History and Technology
Garrett Putman Serviss
Agnes M. Clerke, J. Ellard Gore, and A. Fowler
Denison Olmsted
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William Gaertner and Company
Thomas Dick
These books are free to read. Each is in the public domain in the United States; check your own country's rules before you copy or share one.