books.google.co.in - Originally published in two volumes, The Printing Press as an Agent of Change is now issued in a paperback edition containing both volumes. The work is a full-scale historical treatment of the advent of printing and its importance as an agent of change. Professor Eisenstein begins by examining the general...http://books.google.co.in/books/about/The_Printing_Press_as_an_Agent_of_Change.html?id=WR1eajpBG9cC&q=astronomers&utm_source=gb-gplus-shareThe Printing Press as an Agent of Change