The book “Assembly, testing, operation and repair of devices” by Mikhail Ilyich Filonov is a real find for everyone who is interested in the world of instrumentation and wants to better understand the processes associated with the creation and maintenance of various technical devices. This work is a comprehensive guide covering all stages of the life cycle of devices, from their assembly to operation and repair. Filonov, as an experienced engineer and teacher, shares his knowledge and practical experience, which makes the book not only theoretically sound, but also extremely useful for practitioners. It deals in detail with assembly technologies, test methods, as well as the nuances of operation and repair of devices. The reader will find here a lot of useful information that will help him not only in his studies, but also in his professional activities. The book will be of interest to a wide range of readers: from students of technical universities studying instrumentation, to experienced engineers seeking to update their knowledge of modern technologies. It can also attract the attention of DIY lovers (do it yourself), who want to understand the intricacies of working with devices and learn how to properly assemble and maintain them. If you are looking for literature on topics related to electronics, mechanics or automation, then this edition will be a great addition to your library. The topics raised in the book are very diverse and relevant. Filonov draws attention to the importance of high-quality assembly and testing of devices, emphasizing that even the slightest mistake at the production stage can lead to serious problems in operation. He also discusses the reliability and durability of devices, which is especially important in modern production, where quality requirements are constantly growing. The author's style is distinguished by clarity and accessibility, which makes the material understandable even for those who are just starting their way in the world of instrumentation. Filonov uses many examples from practice, which allows the reader to better assimilate the material and see how theoretical knowledge is applied in practice. His previous works, such as Fundamentals of Electronic Instrument Design and Instrument Assembly and Repair Technology, have also been recognized for their practical focus and accessibility. The book “Assembly, testing, operation and repair of devices” is not just a textbook, but a whole world of opportunities for those who want to understand how modern devices are arranged and how to work with them. It inspires the study of new technologies and practices, encouraging the reader to further develop in the field of instrumentation. If you want to become an expert in this field or are just interested in how the devices around us work, this edition will be your reliable companion in this fascinating journey. Do not miss the opportunity to immerse yourself in the world of technology and learn how to create, test and repair devices that make our lives more comfortable and convenient. Filonov’s book is your first step to mastery in instrumentation!