Modern Compressible Flow: With Historical Perspective in its fourth edition preserves the authors 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. About the Author John D. Anderson, Jr., was born in Lancaster, Pennsylvania, on October 1, 1937. He attended the University of Florida, graduating in 1959 with High Honors and a Bachelor of Aeronautical Engineering Degree. From 1959 to 1962, he was a Lieutenant and Task Scientist at the Aerospace Research Laboratory at Wright-Patterson Air Force Base. From 1962 to 1966, he attended The Ohio State University under National Science Foundation and NASA Fellowships, graduating with a Ph.D. in Aeronautical and Astronautical Engineering. In 1966, he joined the U.S. Naval Ordnance Laboratory as Chief of the Hypersonic Group. In 1973, he became Chairman of the Department of Aerospace Engineering at the University of Maryland, and since 1980 has been a professor of Aerospace Engineering at Maryland. In 1982, he was designated a Distinguished Scholar/Teacher by the University. During 1986-1987, while on sabbatical from the university, Dr. Anderson occupied the Charles Lindbergh chair at the National Air and Space Museum of the Smithsonian Institution. He continued with the Air and Space Museum one day each week as its Special Assistant for Aerodynamics, doing research and writing on the history of aerodynamics. In addition to his position as professor of aerospace engineering, in 1993 he was made a full faculty member of the Committee for the History and Philosophy of Science and in 1996 an affiliate member of the History Department at the University of Maryland. In 1996 he became the Glenn L. Martin Distinguished Professor for Education in Aerospace Engineering. In 1999 he retired from the University of Maryland and was appointed Professor Emeritus. He is currently the Curator for Aerodynamics at the National Air and Space Museum, Smithsonian Institution, and Glenn L. Martin Institute Professor of Engineering at the University of Maryland.