Lobachevsky is a fascinating novel written by V. F. Kagan, which immerses the reader in the world of mathematics, philosophy and human relations . This book is not just a biography of the outstanding Russian mathematician Nikolai Lobachevsky, but also an in-depth study of his inner world, his struggle for recognition and understanding in a society that was not always ready to accept innovative ideas. The plot of the novel unfolds against the background of the tumultuous era of the XIX century, when Lobachevsky, as a professor at Kazan University, faces misunderstanding and even hostility from his colleagues. Kagan masterfully describes how Lobachevsky, despite all the obstacles, continues to develop his ideas about non-Euclidean geometry, which will subsequently change the ideas about space and time. The reader will be amazed at how the author combines scientific concepts with the personal experiences of the hero, creating a multilayered and deep portrait of a person who was not afraid to challenge the generally accepted truths. The book will be interesting not only for lovers of mathematics, but also for those who appreciate deep psychological portraits and philosophical reflections. Approaching the work from different angles, readers will be able to see how science and art are intertwined in Lobachevsky’s life, how his discoveries reflect his inner conflicts and aspirations. This makes the novel universal and relevant to a wide audience - from students and teachers to anyone interested in the history of science and the fate of great personalities. Topics raised in Lobachevsky range from the struggle for recognition and self-expression to questions about the nature of truth and reality. Kagan raises important philosophical questions about how society perceives innovation and how often brilliant ideas go unnoticed or rejected. These reflections make the novel not only a historical, but also a philosophical work that makes you think about what it means to be an innovator in a world full of bias and conservatism. Style B. F. Kagan can be described as lively and rich, with vivid descriptions and deep dialogues. He skillfully uses historical facts and artistic techniques to create an atmosphere of time and place in which Lobachevsky lived. Readers familiar with his other works, such as Shadows of the Great, will appreciate his ability to combine facts with fiction, creating fascinating and informative stories. If you are looking for a book that not only entertains, but also makes you think about the complex issues of human existence and scientific progress, Lobachevsky will be an excellent choice. This novel is suitable for both young audiences and more mature readers interested in the history of science, philosophy and personal stories of great people. The book will be of interest to those who appreciate deep and multilayered stories, as well as those who seek inspiration in stories about overcoming difficulties and striving for truth. Thus, Lobachevsky is not just a book about mathematics, it is a work about life, about the struggle for ideas and about how one person can change the world. After reading this novel, you will not only learn about the great scientist, but also get the opportunity to think about how important it is to follow your beliefs, despite the obstacles.