The book “Definition of hardness of nanocoatings” by Yu. A. Bykov is a fascinating and in-depth study that immerses the reader in the world of nanotechnology and materials science. This publication will be an indispensable tool for both professionals in the field of science and technology, and for students seeking to expand their knowledge of modern methods of analyzing and evaluating the properties of materials. In his book, Bykov examines the most important characteristic of nanocoatings hardness, which plays a key role in determining their functionality and applicability in various industries. The author not only explains the theoretical aspects, but also shares practical methods for measuring hardness, which can be used in laboratory conditions. The reader will be able to learn about different approaches to hardness assessment, such as micro- and nano-indentation methods, and how these methods can be adapted to work with nanostructured materials. The book will be of interest to a wide range of readers: from undergraduate and graduate students studying physics, chemistry and materials science, to experienced professionals and researchers working in the development of new materials and technologies. If you are passionate about science and want to understand how nanocoatings can change the future of various technologies, this publication will be a real find for you. The topics raised in the book are relevant and important for modern society. Nanocoatings are used in a variety of areas: from electronics and medicine to the protection of materials from corrosion and wear Bykov focuses on how the hardness of nanocoatings affects their durability and efficiency, making this book particularly valuable for engineers and developers working with new materials. Style Y. A. Bullish is clear and accessible, which allows the reader to easily assimilate complex concepts. The author uses many illustrations and graphs, which makes the material more clear and understandable. This publication is not only informative, but also visually attractive, which contributes to a better perception of information . The book “Determination of nanocoating hardness” is part of a wider series of Bykov’s works devoted to nanomaterials and their properties. If you are interested in such topics as nanotechnology, solid state physics, as well as new methods of material analysis, you should pay attention to his other publications. Bykov’s works have already established themselves as reliable sources of information, and this publication will not be an exception. In conclusion, “Determination of the hardness of nanocoatings” is not just a book, but a whole world of knowledge that opens up to the reader. It demonstrates how science can influence our lives and how new technologies can change the way we think about materials. If you want to be aware of the latest advances in nanomaterials and their applications, this book will be your faithful companion in a fascinating journey through the world of science.