Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
Henry Mayhew
William Booth
L. G. Chiozza Money
Walter A. Wyckoff
Frank Andrew Munsey
S. A. Barnett and Mrs. S. A. Barnett
Edwin A. Brown
Various
William Harbutt Dawson
Alfred Russel Wallace
Basil Thomson
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.