The book "Running and testing of tractor and automobile engines", created by the team of authors, is an indispensable source of knowledge for all who are interested in mechanics, engineering and, in particular, automotive technology. This edition will be a real guide to the complex run-in and test processes that are necessary to ensure the reliability and durability of engines used in modern vehicles. The book focuses on the various aspects of engine run-in and testing that are critical to their efficient operation. The authors consider in detail both theoretical and practical aspects of these processes, ranging from the choice of the correct method of running to the analysis of the obtained test results. The reader will be able to learn how to properly prepare the engine for operation, what parameters need to be taken into account when testing it and how to interpret the results in order to ensure maximum performance and minimal risk of failure. This book will be especially useful for students of technical universities, specialists in the field of mechanical engineering and automotive engineering, as well as for anyone who wants to deepen their knowledge in this field. It is suitable for both beginners and experienced engineers seeking to update their skills and become familiar with modern methods and technologies that are used in run-in and engine testing. If you are fond of cars, tractor equipment or just want to understand how the engine of your car works, this edition will be a real find for you. The topics raised in the book cover a wide range of issues, such as the impact of different operating conditions on engine operation, diagnostic and control methods, and modern technologies used in tests. The authors emphasize the importance of careful running, which allows you to identify possible defects and shortcomings before the start of full operation. This is especially true in light of current environmental and fuel economy requirements, where every detail matters. The style in which the book is written is characterized by accessibility and clarity of presentation .. The authors use simple and understandable terms, which makes the material available to a wide audience. In addition, the book is illustrated with many diagrams and graphs that help to better understand complex processes and mechanisms. This makes reading not only useful, but also fascinating. If you are looking for literature that will help you understand the intricacies of running and testing engines, you should pay attention to other works on automotive engineering and mechanics. Books such as “Automotive Engines: Device and Work” or “Basics of Automotive Electronics” can complement your knowledge and broaden your horizons. In conclusion, “Running and Testing Tractor and Automotive Engines” is not just a book, but a whole world that opens doors to the exciting world of mechanics and engineering. Her