Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
Sir Arthur Stanley Eddington
Mary Somerville
James Johnstone
J. W. N. Sullivan
Wilhelm Max Wundt
marquise Gabrielle Emilie Le Tonnelier de Breteuil Du Châtelet
Max Planck
Harlow Shapley and Cecilia Payne-Gaposchkin
Sir Horace Lamb
Archimedes
G. H. Hardy
William Elwood Byerly
J. J. Thomson
Richard C. Tolman
Hermann Sieveking
Henri Poincaré
H. Bryon Heywood and Maurice Fréchet
R. Clausius
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.