The book "Ordinary Differential Equations" edited by B. In. Kalinin is an indispensable resource for all who seek a deeper understanding of one of the most important sections of mathematical analysis. The 2017 edition is a comprehensive and affordable approach to the study of ordinary differential equations (ODI), making it ideal for both students and professionals working in various fields of science and technology. In this tutorial, the authors examine in detail the basic concepts and methods associated with solving ordinary differential equations. The book covers a wide range of topics, ranging from the simplest first-order equations to more complex systems of equations. Each section contains theoretical explanations, examples of solutions and tasks for independent work, which allows the reader not only to assimilate the material, but also to apply it in practice. What makes this book particularly appealing is its accessible style of presentation. The authors strive to convey complex mathematical ideas in a simple and understandable language, which allows the reader not only to follow the logic of the presentation, but also to independently master the material. This is especially important for students who may face difficulties in understanding the theory, but thanks to clear explanations and a variety of examples will be able to confidently move forward. The book will be of interest not only to students of mathematical and engineering specialties, but also to teachers who are looking for high-quality educational material for their courses. It can also be useful for graduate students and researchers working in the fields of mathematical modeling, physics, biology and economics, where ODUs play a key role in describing dynamic processes. The topics raised in the book cover not only mathematical aspects, but also the practical application of OCA in real life. Readers will be able to learn how these equations are used to model phenomena ranging from mechanics to biology and economics. This makes the book relevant and useful for those who want to see how the theory intersects with practice. Style B. In. Kalinin and his colleagues are distinguished by clarity and logic, which allows the reader to easily follow the course of thought of the authors. In addition to Ordinary Differential Equations, Kalinin is also known for his work in mathematical analysis and function theory, which adds value to his publications. His experience and deep understanding of the subject make each page of the book rich and informative. If you are looking for a high-quality tutorial on ordinary differential equations, which will help you not only to master the theory, but also to learn how to apply it in practice, then “Ordinary differential equations” In. Calinina is exactly what you need. This book will be your reliable companion in the world of mathematics, opening up new horizons and opportunities for the study and application of knowledge. Do not miss the chance to immerse yourself in the fascinating world of differential equations and learn how to use them in your future professional activities!