Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
Henri Poincaré
Marie Curie
D'Arcy Wentworth Thompson
Mary Somerville
Edmund Callis Berkeley
Charles Frederick Kroeh
Albert Einstein
J. Malcolm Bird
David Hilbert
Maria Mitchell
James J. Walsh and Brother Potamian
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James Clerk Maxwell
John Phin
Lawrence Weaver
J. A. Zahm
Mary Wollstonecraft Shelley and James Montgomery
George Biddell Airy
Charles Babbage
James Ferguson
J. Willard Gibbs
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.