Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
O. Schmeil and Jost Fitschen
Gregor Mendel
Udo Dammer
Alexander von Humboldt
A. F. W. Schimper
Eduard Strasburger
Ludwig Reinhardt
Ludwig Borchardt
Wilhelm Bölsche
Harriet Beecher Stowe
Arabella B. Buckley
Deutsche Kolonialgesellschaft. Kolonial-Wirtschaftliches Komitee and Rudolf Schlechter
Georg August Schweinfurth
Diedrich Westermann
Max Schultze
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.