Modern Compressible Flow: With Historical Perspective in its fourth edition preserves the author’s informal writing style that talks to the reader thereby providing an understandable and enjoyable teaching instrument in the classroom or independently for the study of compressible fluid flow. This book, in total, offer its readers a balanced treatment of both the classical and modern aspects of compressible flow. It is aimed primarily at the senior undergraduate and first-year graduate student in aerospace, mechanical, and chemical engineering. However, it is also written for use by the practicing engineer and scientist who is striving to obtain a cohesive picture of the subject of compressible flow from a modern perspective. Salient Features: 1. End-of-Chapters added to those chapters as well which are heavily theoretically based in order to give a type of “full closure†on understanding the material. 2. New section “Suggestions†added at the end of every chapter to help with problem solving and connect the reader more strongly with the particular relevant physical and theoretical content in the text reading material. 3. Chapter 15 on Hypersonic Flow has been expanded with new content and figures on important physical and theoretical features that distinguish it from basic supersonic flow. 4. This new edition maintains the content devoted to computational fluid dynamics and high-temperature gas dynamics, two fields of intellectual endeavor that are intrinsically woven into most modern applications of compressible flow.