In the second edition of their successful textbook, Professors Landahl and Mollo-Christensen have taken the opportunity to include recent developments in the field of chaos and its applications to turbulent flow. This timely update continues the original theme of the book: presenting the fundamental concepts and the basic methods of fluid flow turbulence that enable the reader to follow the literature and understand current research. The emphasis on the dynamic processes that create and maintain turbulent flows gives this book an original approach.