Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
Charles Hermite
C.-F. Volney
Joseph-Remi-Leopold Delboeuf
graf Leo Tolstoy
Ioannis Psicharis
Ernst Leonard Lindelöf
Various
H. Bryon Heywood and Maurice Fréchet
D. Bierens de Haan
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.