From the reviews: "The book gives a comprehensive view of the optimization of systems governed by partial differential equations of elliptic type. ... The book is carefully written. Basic tools of convex analysis, an abstract optimization theory, notions on the well-posedness of elliptic systems, and the existence results for optimal control problems are presented in a simple way. ... The book will therefore be useful for confirmed researchers as well as students willing to enter in the field. One could even teach a graduate course by selecting material." (Joseph Frederic Bonnans, Zentralblatt MATH, Vol. 1106 (8), 2007)