The book "Method of calculation of economic limits of application of open systems of fuel drying" by Nikolai Mikhailovich Mikhailov is a unique work that immerses the reader in the world of modern technologies and economic calculations connected with efficient use of resources. This work will be particularly interesting for those involved in energy, ecology, as well as economics in the field of fuel technologies. In his book, the author examines in detail the methodology that allows to determine the economic limits of the use of open fuel drying systems. This is an urgent topic, especially in the context of global climate change and the need to transition to more sustainable energy sources. Mikhailov not only describes the theoretical foundations, but also offers practical solutions that can be applied in real conditions. The reader will be able to learn about various aspects of the functioning of drying systems, their advantages and disadvantages, as well as how to correctly assess their economic feasibility. The book will be useful to both students and graduate students studying energy and ecology, as well as practitioners working in the development and implementation of new technologies .. Engineers, economists and managers involved in the optimization of production processes will find here a lot of useful ideas and recommendations. This work may also be of interest to researchers who are looking for new approaches to solving problems related to fuel efficiency and reducing the negative impact on the environment. One of the key themes of the book is the need to find a balance between economic efficiency and environmental safety. Mikhailov raises important questions about how technology can help solve problems related to environmental pollution and the depletion of natural resources. He emphasizes that the introduction of open fuel drying systems can not only reduce production costs, but also significantly reduce emissions of harmful substances into the atmosphere. The author's style is distinguished by clarity and accessibility, which makes complex technical aspects understandable to a wide audience. Mikhailov masterfully combines a scientific approach with practical examples, which allows the reader not only to learn the theory, but also to see how it is applied in practice. In his other works, he can also find an in-depth analysis of modern technologies and their impact on the economy and the environment, which makes him an expert in this field. The book "Methods for calculating the economic limits of the use of open fuel drying systems" will be an indispensable tool for everyone who seeks a deeper understanding of modern energy technologies and their economic aspects. It will not only expand the reader’s horizons, but also provide practical tools for working in the rapidly changing world of energy. If you are interested in the topics of sustainable development, efficient use of resources and want to be at the forefront of new technologies, this book will become your reliable companion in the study of complex but fascinating issues concerning the future of the energy sector.