"Paul Dirac and 20th Century Physics" is a fascinating and in-depth study of the life and scientific activities of one of the most prominent physicists of the 20th century, Paul Dirac. The book, prepared under the editorship of Boris Vladimirovich Medvedev and other authors, is not just a biography, but a whole panoramic view of the era in which Dirac created, and the scientific achievements that he left behind. From the first pages, the reader plunges into a world where physics becomes not just a set of formulas and theories, but a lively and dynamic process full of discoveries and unexpected turns. Dirac, whose ideas about quantum mechanics and field theory became fundamental, appeared to us not only as a scientist, but also as a person whose life was full of searches, doubts and triumphs. The book reveals his inner world, showing how personal qualities, such as tenacity and the pursuit of truth, contributed to his scientific achievements. This work will be of interest to a wide range of readers: from students and graduate students studying physics and mathematics, to anyone interested in the history of science and the biographies of great scientists. It will especially attract the attention of those who want to understand how Dirac’s ideas have influenced the modern understanding of physics and how they continue to shape scientific discussions and research today. The themes raised in the book are diverse and multi-faceted. It examines not only Dirac's scientific achievements, such as Dirac's equation, antiparticle prediction, and contributions to quantum electrodynamics, but also his philosophical views on the nature of reality and the role of mathematics in physics. The book also addresses issues related to the development of science in the 20th century, including the interaction between theoretical physics and experimental practice, as well as the impact of historical context on scientific discoveries. The style in which the book is written is clear and accessible, which makes complex concepts understandable even for readers who do not have deep knowledge in the field of physics. The authors skillfully balance between scientific rigor and fascinating narrative, which allows the reader not only to learn, but also to enjoy reading. In addition, the book contains many illustrations and diagrams that help to visualize the ideas and theories described. Boris Medvedev, editor and one of the authors, is known for his work in the field of physics and the history of science. His contribution to this book highlights his deep understanding of the subject and his desire to convey to the reader the importance of Dirac's legacy. Medvedev’s other notable works also deal with topics related to physics and its history, making him an expert in the field. Paul Dirac and 20th Century Physics is not just a book about a great scientist, it is the key to understanding an entire era in science. Readers interested in topics such as quantum mechanics, the theory of relativity, and the philosophy of science will find in this work many valuable ideas and inspirations. This book will be an excellent addition to the library of everyone who seeks to understand more deeply not only physics, but also the very essence of scientific search.