Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
Augustus De Morgan
G. A. Wentworth
Robert Record
Felix Klein
Gino Loria
Henry Parker Manning
Thomas Hobbes
Lyon Des Roys
Hendrik Sluijters
James Bell Salmond
Rudolf Rothe
Archimedes
Euclid, Raymond Clare Archibald, Franz Woepcke, and Leonardo Fibonacci
Paul Carus
Alexis-Claude Clairaut
Lewis Carroll
Theodor Reye
Johannes Frischauf
Ernest Vessiot
H. Laurent
Albert Ribaucour
Wolfgang Vogt
Otto Bohler
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.