The book «Spectral methods: methodical instructions for laboratory work on the discipline «Spec signal processing» edited by A. A. Chertorysky is a unique manual that will become an indispensable assistant for students, graduate students and specialists in the field of signal processing .. This publication contains methodological guidelines that will help readers to better understand and master the spectral methods used in various fields of science and technology. The importance of signal processing in the modern world is difficult to overestimate. Signals are all around us, from radio waves to sound and visual data. The book of Chertorysky offers the reader not only a theoretical basis, but also practical tasks that will consolidate the knowledge gained. Each section of the book is illustrated with examples and assignments, which makes the study of the material more accessible and fascinating. For whom is this book intended? First of all, it will be of interest to technical students studying the discipline "Signal Processing" . But not only them: graduate students and young researchers working in the field of radio engineering, acoustics and data processing will also find it a lot of useful. Even experienced professionals will be able to refresh their knowledge and get acquainted with new approaches in signal processing. The topics that are raised in the book cover a wide range of issues: from the foundations of signal theory to complex methods of spectral analysis. Chertorysky focuses on the practical application of theoretical knowledge, which makes the book especially valuable for those who seek not only to learn, but also to apply their knowledge in practice. In each section, readers will find assignments that will help them develop analytical thinking and real data skills. The author's style is distinguished by clarity and accessibility of presentation, which makes complex concepts more understandable. A. A. Chertorysky is an experienced teacher and researcher who knows how to convey information to students . His other well-known works are also devoted to signal processing and mathematical modeling, which confirms his in-depth knowledge in this field. The book "Spectral Methods" not only enriches the reader with theoretical knowledge, but also develops the practical skills necessary for successful work in modern conditions. It will be an excellent addition to the educational materials and will help students and specialists to confidently walk on the path to professional growth. If you are looking for literature on signal processing, spectral methods, or just want to deepen your knowledge in this area, then “Spectral methods” A. A. Chertoria is exactly what you need. Do not miss the opportunity to discover the world of spectral analysis and learn how to apply it in your practice. This book will be your reliable companion in the study and mastering of complex but fascinating methods of signal processing.