Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
Thomas Henry Huxley
James Sully
A. R. Harding
Katherine Dunlap Cather
C. R. Clifford
Charles N. Fowler
Anonymous
Harry Lyman Koopman
Hilaire Belloc
Oliver Goldsmith
Arthur Quiller-Couch
George Santayana
James Lukin
Arthur E. Bostwick
Various
E. Nesbit
J. A. Warder
Jerome Buell Lavay
Archibald Scott
Annie F. Johnston
Newell Dwight Hillis
United States. Congress. House. Committee on Science and Astronautics.
Andrew Lang
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.