Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
Alexander von Humboldt
Johann Wolfgang von Goethe
Heinrich Heine
Fedor Jagor
C. Semper
Christian Reuter
Hermann Hesse
A. F. W. Schimper
Richard Andree
Emil Holub
Various
Anton W. Nieuwenhuis
Ina von Binzer
Eduard Strasburger
Mark Twain
Josef Kyselak
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.