"Principal questions of quantum mechanics" is a fascinating and in-depth study written by the outstanding Russian physicist D. and . Blokhintsev . This book will be a real discovery for anyone interested in the basics of quantum mechanics, its paradoxes and philosophical aspects. In it, the author raises the most important questions regarding the nature of matter and light, and also explores the fundamental principles on which modern physics is based. Quantum mechanics is not just a set of formulas and equations, it is a whole world full of mysteries and amazing phenomena. Blokhintsev, possessing a unique gift to explain complex things in simple language, immerses the reader in this exciting field of science. It addresses key aspects such as superposition, entanglement, the uncertainty principle, and many others, focusing on their philosophical and practical implications. The reader will be able not only to understand how the quantum world works, but also to think about what this means for our perception of reality. This book will be of interest to both students and graduate students of physics, as well as to a wide audience who want to understand the basics of quantum mechanics. If you are fond of science, philosophy or just seek to expand your horizons, “Principal questions of quantum mechanics” will be for you a real guide to the world of quantum puzzles. Readers who are already familiar with such works as “Quantum Physics for Dummies” or “Quantum Mechanics: Concepts and Methods” will find in Blokhintsev’s book a deeper and more detailed coverage of topics that interest them. The topics raised in the book have not only scientific but also philosophical significance. Blokhintsev explores how quantum mechanics changes our understanding of the world, what observation is and how it affects reality. It asks questions that have troubled the minds of scientists for decades: does objective reality exist outside of the observer? What is the nature of time and space in the quantum world? These questions will not leave indifferent any reader striving for a deep understanding of the surrounding world. Blokhintsev's style is distinguished by clarity and logic. He masterfully combines scientific facts with philosophical reflections, making the text understandable even to those who are not professional physicists. The author uses many examples and analogies to illustrate complex concepts, which makes reading not only cognitive, but also fascinating. His previous works, such as Quantum Mechanics and Its Philosophical Aspects, have already gained recognition among readers and professionals, and in this book he continues to develop his ideas, offering new views on known problems. “Principal questions of quantum mechanics” is not just a textbook, it is a real intellectual adventure book that makes you think about the fundamental questions of being. If you want to delve into the world of quantum physics and discover new horizons of knowledge, this work will become an indispensable source of information and inspiration for you. Do not miss the opportunity to touch the secrets of the quantum world with D. and . Blokhintsev!