"Spiral Structure in Galaxies: A Density Wave Theory" by Bertin & Lin, published in 1996 by MIT Press, is a textbook that delves into the intricate physics behind the spiral structure of galaxies. The authors explore the role of density waves in shaping the observed patterns of stars and gas within galaxies. The book is written in English and spans over 280 pages, offering a comprehensive examination of this subject area for students and researchers alike. With a focus on waves, astronomy, and physics, this hardcover book is a valuable resource for those interested in the fascinating world of galaxy formation and evolution.