After hearing the author of this remarkable book interviewed on Radio 4's Start the Week, I rushed to get a copy, and I have not been disapointed. The book describes the role which glass has played in the advancement of Man and civilization. It demonstrates the remarkable effect of NOT using glass as it was used in the West had on the worlds of Islam and the Orient. My only criticism is the author's style--what he has to say is exciting and very interesting, but much of the spark of his message is hidden in verbosity, he could certainly have come to the point much quicker and with more impact--perhaps he feared that the book would be too short! Robert Temple's excellent book, THE CRYSTAL SUN deals with the development and use of lenses in antiquity in a more complete manner.