Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
F.C.S. Richard Anderson
Robert S. Ball
S. P. Langley
David Brewster
Henry Smith Williams and Edward Huntington Williams
Thomas Savery
Ernst Lehrs
David P. Todd
David Morrison and Jane Samz
Alexander Moszkowski
Edward S. Holden
701 downloads
George P. Marsh
S. P. Langley and Charles M. Manly
Unknown
Lawrence Radiation Laboratory
Various
Sir J. A. Fleming
J. B. S. Haldane
Arthur Berry
Robert Louis Stevenson
William T. Jeans
Camille Flammarion and J. F. Blake
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.