Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
J. A. Ferguson
Harold M. Sherman
Fergus Hume
Clarence Young
Francis Worcester Doughty
J. S. Fletcher
Eugène François Vidocq
Arthur B. Reeve
Hulbert Footner
Louis Tracy
A. Hyatt Verrill
J. J. Connington
Prentiss Ingraham
Victor Bridges
Nicholas Carter and Alden F. Bradshaw
Means Davis
Nicholas Carter and C. C. Waddell
Ray Humphreys
Roy J. Snell
Mildred A. Wirt
Capwell Wyckoff
Ambrose Newcomb
Paul W. Fairman
Various
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.