Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
Various
Michel Chevalier
Herbert A. Shearer
Birney C. Batcheller
Edward Hungerford
Charles Prelini
Mary Wollstonecraft Shelley and James Montgomery
American School of Correspondence
George L. Vose
Alex Schwalbach and Julius Wilcox
N. Hawkins
Robert P. Multhauf and Victor F. Lenzen
Archie Seldon Milton and Otto K. Wohlers
Henry E. Baker
H. H. Windsor
E. D. Hardy and American Society of Civil Engineers
Frank B. Scholl
James White
James Cutbush
F. H. Leeds and W. J. Atkinson Butterfield
Henry Charles Moore
Henry S. Gillette
Richard Bitmead
Charles N. Pickworth
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.