This comprehensive second edition focuses on the basics and advanced themes in the fundamentals of gas dynamics. It covers fundamental concepts and governing equations of different flows, and includes end of chapter exercises based on the practical applications. An additional chapter on gas dynamics of the flow of steam in nozzles has been incorporated. Worked examples and exercise problems have been drawn from practical applications in propulsion and gas dynamics. This textbook is ideal for undergraduate students in the disciplines of Mechanical and Aerospace engineering. Also, scientists and engineers working in the areas of aerospace propulsion and gas dynamics will find this book to be a valuable addition.