Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
Nelson Annandale
Henry James Slack
James E. Deacon
Wilhelm Weltner, Ludwig Plate, F. A. Forel, W. Migula, Friedrich Ludwig, August Gruber, and Julius Vosseler
Stephan Clessin, Arthur Seligo, Friedrich Zschokke, C. Apstein, Paul Kramer, E. Schmidt-Schwedt, and Friedrich Borcherding
Eli Heimans and Jac. P. Thijsse
R. E. Coker
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.