The book "Termodynamics . Characteristic Functions. Tutorial” by Vasilyev I. A. , Volkova D. P. and Zarichnyak Yu . P. It is a unique and in-depth analysis of one of the most fundamental areas of physics thermodynamics. This tutorial will be an indispensable assistant for students, graduate students and anyone interested in physics, engineering and related sciences. In thermodynamics, the laws governing heat processes and energy transformations are investigated, and this book reveals them with extreme care. The authors invite the reader to immerse himself in the world of characteristic functions, which are key elements in the understanding of thermodynamic systems. Reading this guide, you will learn how different parameters, such as temperature, pressure and volume, are interrelated and how they affect the behavior of substances in different states. The book is written in accessible language, which makes it suitable for a wide audience. It will be interesting not only for students of technical specialties, but also for teachers, researchers and anyone who wants to deepen their knowledge in the field of thermodynamics. It will be especially useful for those who are preparing for exams or engaged in scientific research. The topics covered in the book cover a wide range of issues, from the basics of thermodynamics to more complex concepts such as phase transitions and thermodynamic cycles. The authors pay attention to both theoretical aspects and practical applications, which allows the reader not only to understand the basic principles, but also to see how they are applied in real life. The style of writing Vasilyev, Volkov and Zarichnyak is clear and logical, which makes complex concepts more understandable. They use many examples and tasks that help to consolidate the material and develop analytical thinking. This manual is not just a set of theoretical knowledge, but a practical guide that encourages the reader to actively study and research. The book also includes many illustrations and graphs that help to visualize complex processes and make learning more fun. The authors strive to create not just a textbook, but a whole world of knowledge in which the reader can immerse himself and explore it independently. If you are looking for literature on thermodynamics that will combine a deep understanding of the subject and the accessibility of the presentation, then “TERMODYNAMICS . Characteristic Functions. Training Manual" is exactly what you need. This is not just a book, it is your guide to the world of thermodynamic research, which will help you not only prepare for exams, but also develop an interest in science. Vasilyev I . A. , Volkov D. P. and by Y.. P. authors, known for their scientific works and teaching aids, who have already managed to win recognition in the academic environment . Their previous work also covers important aspects of physics and engineering, and each is of high quality and attention to detail. Do not miss the opportunity to expand your knowledge and deepen your understanding of thermodynamics with this tutorial. It will become not only a source of knowledge, but also an inspiration for further research and discoveries in the field of science.