Ion Paraschivoiu enjoys a good reputation in the wind energy fraternity for his significant contributions to the theory of the aerodynamic performance of the Darrieus vertical axis wind turbine. His software programs for these calculations, described in the book, have been used successfully by others for design purposes and to assist in the evaluation of VAWT field tests. Dr. Ion Paraschivoiu is J.-A. Bombardier Aeronautical Chair Professor at École Polytechnique de Montréal where he is teaching undergraduate and graduate courses in Aerodynamics. His other research interests include application of advanced aerodynamics methods in the study of aircraft icing, drag prediction and laminar-flow control.