Theory and Design of Gas Turbine . H. 2. Theory and Design of a Multistage Gas Turbine by B. E. Mikhaltseva is an indispensable source of knowledge for specialists and students interested in modern technologies in the field of energy and mechanical engineering. This work continues the research begun in the first part and delves into the complex aspects of designing multi-stage gas turbines, making it relevant for engineers, scientists and anyone seeking to understand the principles of operation and design of these highly efficient machines. The second part of the book is a deep dive into the theory behind the design of multistage gas turbines. Mikhaltsev not only describes the main physical processes occurring in gas turbines, but also offers the reader detailed mathematical models that will help in calculations and design. The book covers topics such as thermodynamics, aerodynamics, mechanics, and materials, allowing the reader to gain a holistic view of the complex relationships that exist in the design of gas turbines. This work will be especially useful for technical university students, graduate students and young professionals who are just beginning their journey in the field of energy. It will also attract the attention of experienced engineers and researchers working in the field of design and operation of gas turbines, as it contains up-to-date data and the latest methods used in this field. Readers interested in the topics of sustainable development and energy efficiency will find in the book many useful ideas and solutions that can be applied to real projects. Mikhaltsev, with extensive experience in the design and research of gas turbines, shares his knowledge with readers using an accessible and understandable language. His writing style is clear and logical, which makes it easy to assimilate even the most complex concepts. In. E. Mikhaltsev is also the author of other significant works in the field of energy, which confirms his authority and deep knowledge in this field. His previous publications, such as Gas Turbine Design Basics and Gas Turbine Theory, have already gained recognition among professionals and students. The book raises important topics such as design optimization, increasing the reliability and durability of gas turbines, as well as the impact of new technologies on the efficiency of these machines. In the face of global climate change and the need to switch to cleaner energy sources, the knowledge outlined in this book is becoming especially relevant. Readers will be able to learn about new design approaches that enable the creation of more efficient and environmentally friendly gas turbines. Thus, "The Theory and Design of Gas Turbine. H. 2. The theory and design of a multistage gas turbine is not just a textbook, but a real guide to the world of modern gas turbine technologies. It inspires new ideas and solutions that can change the way power plants are designed and operated. If you are looking for an in-depth understanding of the operation of gas turbines and strive for professional growth in this area, this book will become a valuable resource for you.