Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
J. G. Medley
Jr. Niel Gray
Various
W. J. Connor
Gertrude L. Stone and M. Grace Fickett
Louis Jacques Mandé Daguerre
E. N. Fales
Vaughan Cornish
Albert Perry Brigham
Robert P. Scott
John Kimberly Mumford
W. H. Wood
American Society of Civil Engineers
United States. War Department
Wayne Whipple and S. F. Aaron
Frank W. Doughty
George Wharton James
Archer Butler Hulbert
Samuel Colt
Arthur Douglas Lumb
George Washington Rains
Anonymous
Florence Nightingale
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.