Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
Richard Threlfall
Various
Harold Jacoby
Thomas Greenhill
J. Ellard Gore
United States. National Aeronautics and Space Administration
Arabella B. Buckley
Silvanus P. Thompson
Thomas Henry Huxley
Samuel Adams Drake
William Le Queux
E. L. Trouvelot
Arthur Conan Doyle
Henry Raymond Rogers
Herbert Spencer
Edward T. Bennett
Sir Thomas Little Heath
Alexandre Dumas and Auguste Maquet
John Ball
Robert B. Meyer
A. E. Dolbear
H. H. Turner
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.