This is the single best book on rocket propulsion systems, covering both liquid and solid rocket engines, hybrid rocket systems, and a dedicated chapter on electric propulsion. The authors include excellent illustrations and graphs to enhance the text, and practical examples which help the reader to grasp the theory. After loaning a copy of this book for over two years from my library, i finally bought it! Definitely recommended to all engineers and scientists who want to expand into the area of rocket propulsion.