The book "Investigation of oscillations of linear and nonlinear systems by the phase plane method: a methodical manual for laboratory and practical exercises" by B. M. Dashenkova is a unique publication that will become an indispensable assistant for students, graduate students and teachers engaged in the study of system dynamics. This manual is not just a theoretical work, but a practical guide that will help readers to better understand the complex processes occurring in linear and non-linear systems. In his book, Dashenkov invites readers to immerse themselves in the world of oscillatory processes, starting with the basics and ending with more complex concepts. The phase plane method, which is considered in the manual, is a powerful tool for analyzing the dynamics of systems, allowing you to visualize and interpret the behavior of various oscillatory processes. Readers will be able to learn how to apply this method in practice, which makes the book especially valuable for those who want to not only theoretically comprehend the material, but also learn how to apply it in real conditions. The book will be of interest to students of technical specialties, as well as those who are engaged in physics, engineering and mathematics. If you are passionate about mechanics, dynamics or just want to expand your knowledge in the field of oscillatory processes, this guide will be an excellent choice for you. In. M. Dashenkov, with deep knowledge and experience, shares his experience and techniques that will help you not only to master the material, but also to develop the critical thinking necessary to solve complex problems. The topics raised in the book cover a wide range of issues, ranging from the basics of oscillatory processes to more complex aspects of nonlinear dynamics. The author focuses on the importance of understanding not only linear systems, but also their nonlinear analogues, which is relevant in modern scientific research. The book also discusses various examples and challenges that will help readers consolidate their knowledge and skills. Dashenkov's style is characterized by accessibility and clarity of presentation. He skillfully combines theory with practical examples, which makes the material understandable and fascinating. The author not only shares his knowledge, but also inspires readers to further study the topic, emphasizing the importance of an experimental approach in science. His previous work has also received recognition in the scientific community, and this manual will not be an exception. If you are looking for books on system dynamics, oscillations, physics or engineering, then "Research on the oscillations of linear and nonlinear systems by the phase plane method" will be an excellent addition to your library. This guide will not only expand your knowledge, but also help you develop practical skills that will be useful in your future career. In. M. Dashenkov created a book that combines theoretical depth and practical utility, which makes it a real storehouse of knowledge for anyone interested in oscillatory processes. Do not miss the opportunity to immerse yourself in the fascinating world of dynamics and fluctuations, which opens up before you this methodological manual. It will be your faithful companion on the way to understanding complex processes and will help you become a real expert in your field.