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