Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
United States. Office of Strategic Services
Carey Rockwell
Murray Leinster
Mack Reynolds
Bryce Walton
Henry Guth
John Henry Goldfrap
Burt L. Standish
John Barrett
Nelson S. Bond
Bascom Jones
Henry Still
Jr. Irving E. Cox
Thomson Burtis
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.