This fourth edition of Gandolfo' s masterful book on economic dynamics is the premier source on dynamic mathematical tools for economists, with illustrations from many areas of current economic research. Not only is the book valuable as an encyclopedic reference book for researchers but is an excellent choice for a textbook on economic dynamics. Gandolfo has managed to provide background in even the most advanced areas of nonlinear dynamics in a readable manner avoiding unnecessarily advanced notation. As a result, the book is broadly accessible while including coverage of many of the deepest areas of current research in economic dynamics. A glance through the table of contents is enough to indicate to almost any serious economist that this is a book to buy. William A. Barnett, Oswald (Distinguished Professor of Macroeconomics, Department of Economics, University of Kansas, USA, and Editor, Macroeconomic Dynamics).