Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
Edmund Harry Leftwich
D. L. James
Thomas S. Gardiner
Wilhelm Bölsche
Sam Moskowitz
John Victor Peterson
Stanton A. Coblentz
C. M. Kornbluth
United States. National Aeronautics and Space Administration
David Milne-Home
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.