Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
Baron Rowland George Allanson-Winn Headley and Clive Phillipps-Wolley
United States. Office of Civil Defense and United States. Public Health Service
Various
W. C. Tuttle
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.