This book covers a variety of issues related to the integration and operation of renewable energy (RE) in power systems. Given the steady increase in demand for electricity, increased interest in protecting the environment and deployment of RE power generation sources, and their increased penetration into the power grid worldwide, the subject book is very timely. Congratulations to the authors! According to them, the book is based on a course module in the master's program on RE at the Center for Renewable Energy System Technology (CREST) at Loughborough University, United Kingdom. The authors also say that this book assumes no previous knowledge in power systems engineering and guides the reader through the basic understanding of how a power system is put together and the way in which it ensures that the consumer demand is met from instant to instant.