"Tools and their heat treatment" by A. M. Saraykina is not just a technical publication, but a real guide to the complex and fascinating world of metals and alloys, designed for engineers, metallurgists, students of technical universities and everyone who is interested in modern technologies for processing instrumental materials. This book reveals to the reader the intricacies of the selection and processing of materials that underlie the production of high-quality tools, machines and equipment, and also demonstrates how to properly use heat treatment to achieve the optimal properties of metals. Author, A. M. Saraykin is a recognized specialist in the field of metallurgy and materials science, known for his in-depth research and practical developments. His style of presentation is clear, logical and attention to detail, which makes the book not only a valuable tutorial, but also a desktop guide for professionals seeking to improve their skills. The book discusses in detail the main types of tool materials, such as fast cutters, carbide alloys, alloys and carbon steels, as well as modern alloys used in high-tech fields. The main value of "Instrumental materials and their heat treatment" is that it is not limited to theoretical aspects. It describes in detail the practical methods of heat treatment, such as hardening, release, normalization and other processes that significantly increase the wear resistance, hardness and strength of materials. The reader will learn how to choose the right heating and cooling modes, what parameters are important for obtaining the desired properties, and what errors can lead to a decrease in the quality of the final product. As a result, the book becomes an indispensable assistant for those who are engaged in the development of new tools or the modernization of existing ones. This book is ideal for students of technical universities studying in metallurgy, materials science, mechanical engineering, as well as for engineers and technologists working in industry. It will be of interest to those who appreciate the practical approach and want to understand how theoretical knowledge is applied in real-world production conditions. In addition, the book can be a good source of information for scientists and researchers engaged in the development of new materials and methods of their processing. The topics raised in the book cover a wide range of issues from the chemical composition and structural features of instrumental materials to methods of their processing and testing. Particular attention is paid to modern trends in the field of heat treatment, innovative alloys and new approaches to improving the performance of tools. A. M. Saraikin masterfully shows why the right choice of materials and competent heat treatment is the key to the durability and efficiency of tools, which is especially important in conditions of fierce competition and product quality requirements. The author's style is distinguished by clarity and consistency, which makes complex technical concepts understandable even for those who are just beginning their journey in the field of materials science. Its rich experience and practical orientation make it possible to perceive the book not only as a theoretical textbook, but also as a practical guide that can be applied in production. In general, “Instrumental materials and their heat treatment” is a book that deservedly occupies a place among the classic publications on metallurgy and materials science, and it will certainly attract the attention of those who are looking for a reliable source of knowledge to increase professional competence. If you are interested in modern metal processing technologies, want to understand how to achieve maximum wear resistance of tools or just seek to expand your knowledge in the field of materials science, this book will become your indispensable assistant. It combines scientific accuracy, practical value and a modern view of the problem, which makes it worthy of attention of both specialists and students who want to deepen their knowledge and improve their professional level.