From the reviews:"It collects problems and exercises regarding the theory of partial differential equations equipping this way the readers with the necessary methodological backgrounds in mathematical modeling of real-world problems. … Of great help for the readers will be the introduction to each chapter which collects the mostly used theoretical tools. The book is highly recommendable … ." (Dian K. Palagachev, Zentralblatt MATH, Vol. 1098 (24), 2006)