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
John Henry Goldfrap
Henry Guth
John Barrett
Burt L. Standish
Nelson S. Bond
Henry Still
Bascom Jones
Thomson Burtis
Jr. Irving E. Cox
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.