The book "Special instruments for measuring linear and angular quantities" by L. D. Kovaleva is a deep and comprehensive research in the field of measurement technologies that will be of interest to both professionals and students seeking to deepen their knowledge in this important area. In a world where measurement accuracy plays a key role in scientific research, engineering and manufacturing, this publication is becoming an indispensable tool for anyone who wants to understand the intricacies of working with modern measuring instruments. The book covers a wide range of topics related to linear and angular quantities, ranging from basics to complex measurement methods. Kovalev shares his experience and knowledge, explaining how to properly use various devices, such as calipers, anglers, levelers and other devices that help in accurate measurement. The reader will be able to learn about the principles of operation of these devices, their calibration and application in various fields - from mechanical engineering to architecture. This book will be especially useful for technical students, engineers and researchers, as well as anyone interested in exact sciences and technologies. It is suitable for both beginners and experienced professionals who want to refresh their knowledge or master new measurement methods. If you are looking for literature on the subject of measuring instruments, then “Special instruments for measuring linear and angular quantities” will be an excellent choice. The topics raised in the book cover not only technical aspects, but also philosophical reflections on the meaning of accuracy in our world. Kovalev emphasizes how important the right measurements are for success in any field from scientific research to everyday life. In an era when technology is rapidly developing, and the requirements for accuracy and quality are constantly growing, knowledge about special devices becomes not only useful, but necessary. The author's style is distinguished by clarity and accessibility, which makes complex concepts understandable to a wide audience. L. D. Kovalev is an experienced teacher and practitioner, which allows him to share not only theoretical knowledge, but also practical advice based on many years of experience in this field. His previous work has also earned recognition, and this book is no exception. Readers familiar with Kovalev's other works will appreciate his ability to combine a scientific approach with practical recommendations. The book “Special instruments for measuring linear and angular values” will be a valuable addition to the library of anyone who seeks professional growth in the field of measuring technologies. It will help you not only to master the theory, but also to learn how to apply the knowledge gained in practice. If you are looking for high-quality literature on measuring instruments, then this edition must be on your list. Thus, this work L. D. Kovaleva is not just a book, but a real find for those who want to deepen their knowledge in the field of measurements and learn to use special devices with maximum efficiency. Do not miss the opportunity to discover the world of accurate measurements and take a step towards professional improvement!