The book "Fundamentals of the theory of reliability", authorship of which remains unknown, is a fundamental and at the same time fascinating introduction to one of the most important and relevant areas of engineering sciences - the theory of reliability. This book will become an indispensable companion for engineers, maintenance specialists, students of technical universities and anyone interested in the safety, durability and stability of complex systems. What is hidden behind the pages of this publication? The focus is on concepts, methods and practical approaches that allow you to evaluate and improve the reliability of various technical devices, systems and infrastructures . The author masterfully reveals the principles of modeling the probability of failures, analyzes the causes of equipment failure and offers effective strategies for minimizing risks. The book traces the logic from basic concepts to more complex models, making it accessible to both beginners and experienced professionals who want to deepen their knowledge. A feature of the "Fundamentals of Reliability Theory" is the balance between theoretical aspects and practical recommendations. The author uses a clear and accessible language, avoiding excessive academic complexity, which allows the reader to easily assimilate the material and apply it in real conditions. The book discusses in detail such topics as statistical methods of reliability assessment, failure analysis, forecasting and modeling methods, as well as strategies for improving the stability of systems. This knowledge is especially valuable for those involved in the design, operation or repair of equipment, as well as for risk management managers. The book is perfect for students and young professionals who are just beginning their journey in the field of engineering and engineering sciences, as well as experienced engineers seeking to systematize and expand their knowledge. Its content will be of interest to those who are engaged in the development of new technologies, ensuring safety in industry, energy, transport and other areas where reliability is the key to success and life. The topics raised in this book are relevant in today's world, where technological progress is rapid, and requirements for the safety and durability of devices are growing every year. The author shows how the theory of reliability helps to predict possible failures, develop systems with high stability and minimize losses and risks. An important part of the book is the consideration of modern methods of failure analysis, the use of statistical models and software tools to assess reliability, which makes the publication a valuable resource for practical work. The author's style is distinguished by clarity, logic and the desire to convey complex concepts as simply and clearly as possible, which makes the book "Fundamentals of Reliability Theory" available to a wide audience. Inspired by classical works in the field of engineering and statistics, the author creates a work that can be compared with popular textbooks on reliability systems or risk management manuals. This book is an excellent choice for those who want not only to understand the basics, but also to learn how to apply the theory of reliability to solve actual engineering problems. If you are looking for a book that will help you understand how to ensure the safety and durability of complex systems, how to predict and prevent failure situations - "Basics of reliability theory" will be your reliable assistant It will open up new horizons of engineering knowledge and provide practical tools to improve the efficiency and safety of your projects. Whether you are a student, an engineer or a risk manager, this book is bound to be a valuable addition to your library, because reliability is not just a theory, but a key to success in the modern world of technology.