From the reviews: ""Valleriani's Galileo Engineer is a valuable contribution to historians of Galileo and of early modern mechanics, as well as to scholars interested in recovering the practices of early modern artisans and engineers. Valleriani's rich exposition and translated letters provide information not only about technical matters related to Galileo's instruments and investigations but also about his interactions with craftsmen and merchants. The detailed analyses of Galileo's working methods ... will provide rich fodder for those interested in understanding the practices of early modern artisan-engineers."" (Renee J. Raphael, British Journal for the History of Science, Vol. 44 (4), December, 2011)