Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
Johann Daniel von Menzel
H. Harvey
George O. Smith
Bertrand W. Sinclair
John Bernard Daley
United States. Public Health Service
Helen R. Hull
Lester Del Rey
Gene L. Henderson
Craig Rice
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.