Opie, Mary-Jane.Sculpture. Dorling Kindersley, 1996. Survey of world sculpture; for younger readers.
Padovano, Anthony.The Process of Sculpture. Doubleday, Reprint, Da Capo, 1981. 1986. Practical, illustrated guide to traditional and innovative techniques.
Pekarik, Andrew.Sculpture: Behind the Scenes. Hyperion, 1992. Discusses the process from the sculptor's viewpoint; based on a television series for children.
Penny, Nicholas.The Materials of Sculpture. Yale University Press, 1994. Explores the many ways in which the same materials have been worked among various cultures.
Pope-Hennessy, John.The Study and Criticism of Italian Sculpture. Metropolitan Museum of Art, 1981. Excellent essays on Donatello, Ghiberti, Rossellino, della Robbia, and other topics.
Read, Herbert.The Art of Sculpture. Princeton, 1961. Aesthetic considerations of form, space, and volume in sculpture.
Read, Herbert.Modern Sculpture: A Concise History. Praeger, Reprint, Thames & Hudson, 1964. 1985. Lively study begins with Rodin, discusses cubism, surrealism, etc.
Wittkower, Rudolf.Sculpture: Processes and Principles. Harper, Reprint, Viking-Penguin, 1977. 1991. Guide to ideas, techniques, and methods, often in sculptors' own words.