The book “Differential Equations: A Study Guide” by Boris Pavlovich Demidovich and Vladimir Pavlovich Modenov is an indispensable resource for students, graduate students and anyone interested in mathematics and its applications in various fields of science and technology . This manual, written with clarity and depth, allows the reader not only to master the theoretical foundations of differential equations, but also to learn how to apply them in practice. The book focuses on differential equations the most important tool for describing dynamical systems. The authors consider in detail both ordinary and partial differential equations, demonstrating their importance in modeling the processes occurring in nature and technology. The reader plunges into the world of mathematical analysis, where each equation becomes the key to understanding complex phenomena such as body motion, temperature change, or wave propagation. The book is suitable for a wide audience: from students of technical and mathematical specialties to teachers and researchers who want to deepen their knowledge in the field of mathematical modeling. It will be especially useful for those who seek to apply theory to real-world problems, whether in engineering, physics, or economics. Each section of the manual is permeated with the spirit of scientific search, which makes it interesting not only to study, but also to inspire new research. The topics raised in the book cover a wide range of issues: from the foundations of the theory of differential equations to complex methods of solving them. The authors pay attention to both classical methods and modern approaches, which allows the reader to get a complete idea of the subject. The book not only teaches, but also develops critical thinking, encouraging the reader to ask questions and seek answers. Demidovich and Modenov’s writing style is distinguished by accessibility and logic. They skillfully combine theory with practical examples, which allows the reader to easily absorb material. The book is filled with illustrations, graphs, and examples that help visualize complex concepts. This makes the tutorial not only useful, but also fascinating. Boris Pavlovich Demidovich is a famous mathematician and author of many textbooks that have become classics in the field of higher mathematics. His work is distinguished by a high degree of scientific rigor and clarity of presentation .. Vladimir Pavlovich Modenov is also a recognized specialist in the field of differential equations, and their joint creativity in this book creates a unique synergy that allows the reader to better understand the material. If you are looking for a high-quality teaching aid on differential equations that will be not only informative, but also inspiring, then “Differential Equations: A Study Guide” is exactly what you need. This book will become your reliable companion in the world of mathematics, open new horizons and help you not only to master complex topics, but also to develop skills that will be useful in your future professional activities. Do not miss the opportunity to immerse yourself in the fascinating world of differential equations with this outstanding tutorial It will be your faithful assistant on the way to understanding complex mathematical concepts and their practical application.