Book 819 Ultrahard Materials . Features of the structure of carbon-graphite materials and the basis of thermodynamics of their transformation into diamond” by Laptev A. and . and Ermolayeva A. A. is a fascinating and in-depth study in the field of materials science, which will be of interest to both specialists and those who are simply interested in science and technology. In this work, the authors immerse the reader in the world of superhard materials, paying special attention to carbon-graphite compounds. The book reveals many aspects concerning the structure of these materials, their unique properties and application possibilities in various industries. Carbon-graphite materials, possessing outstanding characteristics, are becoming increasingly relevant in modern production, and the authors seek to explain why they occupy such an important niche in the world of technology. One of the key themes of the book is the thermodynamics of converting carbon-graphite materials into diamond. This process, at first glance, may seem complicated and confusing, but Laptev and Ermolaev masterfully explain its basics, focusing on the physical and chemical processes that occur during the transformation. The reader will be able to learn about the different methods of diamond synthesis, about how environmental conditions affect this process, and why it is the carbon-graphite materials that are ideal candidates for its implementation. The book will be of particular interest to students and graduate students studying materials, physics or chemistry, as well as professionals in the field of materials science and engineering. It will be a valuable source of knowledge for those working in scientific laboratories, developing new technologies or looking for solutions to improve the strength and durability of materials. The work can also attract the attention of science lovers who want to understand more deeply how the materials surrounding us work in everyday life. The style of the authors is distinguished by clarity and accessibility, which allows even a non-scientist to easily assimilate complex concepts. Laptev and Ermolaev use many illustrations and schemes that help to visualize the topics discussed and make the material more visual. This makes the book not only informative, but also fascinating to read. In addition, this work stands out among other scientific works with its unique combination of theory and practice. The authors not only describe the theoretical aspects, but also give examples of real applications of carbon graphite materials in various industries, such as electronics, mechanical engineering and even jewelry. This creates additional interest for the reader, who will be able to see how scientific research is transformed into real achievements. If you are looking for books on materials, physics, chemistry or just want to expand your knowledge of modern technologies, 819 Ultrahard Materials will be an excellent choice. It will not only enrich your horizons, but also help you better understand how science and technology affect our lives. Do not miss the opportunity to immerse yourself in the world of superhard materials and discover their amazing possibilities together with Laptev and Ermolaev!