Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
Derek J. de Solla Price
Johann Beckmann
Archibald Williams
Gordon Stables, John Nevil Maskelyne, and C. Stansfeld Hicks
Dionysius Lardner
Edward C. Kendall
Joseph William Zaehnsdorf
Samuel J. Record
George Dodd and A. C. Hobbs
Library of Congress
Museum of History and Technology
Samuel Smiles
Fulgence Marion
United States. Army. Corps of Engineers. Manhattan District
Norman F. Joly
Joseph H. Adams
Suelette Dreyfus
John Goerzen and Ossama Othman
William H. Dooley
Clara Barton
Sara Ware Bassett
American School of Correspondence
Theodor Storm
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.