Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
Elisée Reclus
Sir Norman Lockyer
E. Raymond Hall
Miguel de Unamuno
Sir James Emerson Tennent
Philip Parker King
Yu Lu
Edwin Chadwick
Leonard V. Dalton
Clough Williams-Ellis
Various
Henry Fairfield Osborn
Herbert W. Tompkins
Wilbur R. Mattoon and C. B. Webster
Henry S. Salt
Hiram Martin Chittenden
Alfred Russel Wallace
United States. Arms Control and Disarmament Agency
Allen Howard Godbey
William Lewis Herndon and Lardner Gibbon
Enos A. Mills
Daniel Defoe
Alexander von Humboldt and Aimé Bonpland
United States. National Park Service. Division of Publications
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.