Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
United States. Central Intelligence Agency
John Charles Frémont
Brander Matthews
Sir John Mandeville
Ellen Churchill Semple
Strabo
active 12th century of Tudela Benjamin
Mary Somerville
Albert Heintze
C. C. Long
Alexander von Humboldt
Hongzu Xu
George P. Marsh
Richard Hakluyt
Muḥammad ibn Aḥmad Bīrūnī
Emilie Van Beil Jacobs
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.