"Excellent."--Louis P. Towles, Central Wesleyan College"The most stimulating book of the century on the history of technology...a positive delight."--Isis"At once an advance in the study of medieval technology and also the best introduction to the subject for the serious general reader."--The Economist"Still essential reading for students of Medieval studies. A must for those interested in Medieval technology and its impact on the development of western society."--Cecile-Marie Sastre, Flagler College