Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
Sara Ware Bassett
Norman F. Joly
Suelette Dreyfus
Joseph H. Adams
Samuel Smiles
John Goerzen and Ossama Othman
William H. Dooley
Clara Barton
American School of Correspondence
Various
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Marie Curie
Harriet Beecher Stowe and Catharine Esther Beecher
Anonymous
George E. Woodward and F. W. Woodward
United States. War Department
W. S. Lindsay
Jean Armour Polly
Silvanus P. Thompson
Reginald Engelbach
Thomas W. Corbin
Howard Irving Chapelle and Tappan Adney
David Hilbert
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.