"Astrophysics Course . Volume III. Astrospectroscopy" is an outstanding work written by the famous Russian astronomer and astrophysicist Alexander Alexandrovich Belopolsky. This book is the third volume in a series devoted to the basics of astrophysics, and focuses on one of the most exciting and challenging topics in the field astrospectroscopy. Astrospectroscopy is the science of how light coming from celestial bodies can tell us about their composition, temperature, movement, and even about the physical processes occurring in them. In this volume, Belopolsky not only explains in detail the basic principles of spectroscopy, but also immerses the reader in the world of stars, galaxies and other cosmic objects, using examples from modern research. The book is filled with fascinating illustrations and graphs that help to visualize complex concepts, making them accessible for understanding. This work will be of interest to students studying astronomy and astrophysics, as well as professional astronomers who want to deepen their knowledge in the field of spectroscopy. The book can also attract the attention of science lovers who want to understand how astronomers explore the universe and what technologies are used to analyze light from distant objects. The age category of readers varies from high school students to adults interested in science and space. The topics raised in the book cover a wide range of topics, from the basics of spectroscopy to its applications in astronomy. Belopolsky discusses how spectra can help in determining the chemical composition of stars and galaxies, as well as in studying their motion and evolution. It also touches on modern technologies, such as spectrometers and telescopes, which allow astronomers to obtain data previously unavailable for analysis. This makes the book not only a theoretical guide, but also a practical guide for researchers. The author's style is distinguished by clarity and accessibility, which makes complex topics understandable even for those who do not have deep knowledge in the field of physics. Belopolsky skillfully combines scientific rigor with a fascinating narrative, which allows the reader not only to learn, but also to enjoy the process. His previous work, such as "The Course of Astrophysics . Tom I. General Basics" and "Astrophysics Course. Volume II. Stars”, has already won recognition among readers, and this volume continues the tradition of high-quality scientific presentation The Course in Astrophysics . Volume III. Astrospectroscopy" is worthy of attention not only due to its content, but also the relevance of the topics it raises. In an era when space exploration is becoming increasingly important, understanding astrospectroscopy opens up new horizons for the study of the universe. Readers interested in questions related to the origin and evolution of the cosmos will find in this book many answers and new questions for reflection. If you are looking for a fascinating and informative reading about space, astronomy and physics, then the Course of Astrophysics . Volume III. Astrospectroscopy" is exactly what you need. Do not miss the opportunity to immerse yourself in the world of astronomy with one of the leading experts in this field!