This textbook vividly describes the current state of technological development in wind turbines and serves as a reliable guide for students, practitioners, and the curious. Since its first edition in 1991, it has become a standard textbook. The authors of the 16 chapters have almost exclusively been working in the wind power industry for many years. In the current edition, the chapters on Wind, Control and Regulation, as well as Operation in the Electrical Grid, have been completely revised.