Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
Edward W. Byrn
Museum of History and Technology
Victor Appleton
Otto A. Witte
Edith Allen
Arthur H. Beavan
the automotive business magazine Motor
Adam Gowens Whyte
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.