Book «Andrey Nikolayevich Kolmogorov, 1903-1987 . A life full of happiness” by Vladimir Mikhailovich Tikhomirov is not just a biography of an outstanding mathematician, but also a deep immersion in a world where science and human emotions are intertwined, creating a unique picture of the life of one of the most influential minds of the 20th century. Tikhomirov, himself a scientist, with great care and respect approaches the description of the life of Kolmogorov, revealing not only his scientific achievements, but also personal moments that made his life truly happy. Andrei Nikolayevich Kolmogorov is a name familiar to anyone who has ever encountered mathematics, probability theory or statistics. His work has become the basis for many modern trends in science, but Tikhomirov shows that behind these achievements is not only a brilliant mind, but also a person who knew how to enjoy life, find happiness in simple things and inspire others. The book immerses the reader in the atmosphere of the time when Kolmogorov lived and worked, allowing him to see how historical events and personal trials shaped him as a scientist and as a person. This book will especially appeal to those who are interested not only in mathematics, but also in philosophy, the history of science and human destiny. Young students and graduate students seeking to understand how to combine scientific activity with personal life will find many inspiring examples in it. It will also be of interest to more mature readers who appreciate deep reflections on life and its meaning, as well as those who want to learn about how great minds coped with difficulties and found happiness in their work. The topics raised in the book go beyond pure mathematics. Tikhomirov raises questions about what happiness is, how it can be related to work and vocation, and how important it is to find a balance between professional ambitions and personal joys. Kolmogorov, despite his achievements, remained a modest and open person, which makes his image especially attractive to the reader. The book also discusses his relationships with colleagues, students, and loved ones, which adds a human aspect to his scientific biography. Tikhomirov's style is distinguished by clarity and accessibility, which makes complex mathematical concepts understandable to a wide audience. He skillfully combines a scientific approach with literary mastery, creating a fascinating narrative that not only informs but also entertains. Reading this book, you will not only learn about the life of Kolmogorov, but also feel his passion for science and life in general. If you are looking for inspiration, you want to understand how you can achieve success, while remaining true to your principles and finding joy in every day, then "Andrey Nikolaevich Kolmogorov, 1903-1987. A life full of happiness” will be a real find for you. This book is not only a tribute to the great scientist, but also a lesson about the importance of being a person who is able to enjoy life, despite all the difficulties that it can present.