Sculpture
Free to read here, from Project Gutenberg.
The treatises of Benvenuto Cellini on goldsmithing and sculpture
Vasari on technique
Aratra Pentelici, Seven Lectures on the Elements of Sculpture
Art
A History of Sculpture
The mind of the artist
Die Italienische Plastik
Handbook of the Minneapolis Institute of Arts
Sculpture in Spain
The spirit of American sculpture
Sculpture of the Exposition Palaces and Courts
Technik der Bronzeplastik