Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
Eugène-Emmanuel Viollet-le-Duc
Taillevent
Albert Robida
Alfred Franklin
Eugène Amédée Lefèvre-Pontalis
Gustave Fagniez
Gaston Tissandier
de Pisan Christine, Sextus Julius Frontinus, Honoré Bonet, and Flavius Vegetius Renatus
Gabriel Bonnot de Mably
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.