Book of Induction. Combinatorics" by N. I. Vilenkina is a fascinating and deep immersion into the world of mathematical logic and combinatorial structures. This work will be a real find for anyone interested in mathematics, especially for students, teachers and science lovers seeking to expand their knowledge in the field of discrete mathematics. Vilenkin, known for his scientific works and textbooks, offers readers a unique approach to the study of induction and combinatorics. Unlike many other textbooks, the author not only outlines the theory, but also actively involves the reader in the process of thinking, offering many tasks and examples that help to consolidate the material. The book begins with the basics of induction, which allows readers who do not even have a deep knowledge of mathematics to gradually immerse themselves in more complex concepts. The main intrigue of the book is how the author demonstrates the relationship between inductive methods and combinatorial problems. This allows the reader not only to understand how to apply induction in different situations, but also to see how combinatorics can serve as a powerful tool in solving mathematical problems. Vilenkin masterfully shows how simple ideas can lead to complex and interesting results, which makes reading not only useful, but also fascinating. The book will be of particular interest to students of mathematical faculties, as well as teachers who are looking for effective methods of explaining complex topics. It is also suitable for high school students who are passionate about mathematics, and anyone who wants to develop their analytical skills. If you like to solve puzzles and look for non-standard solutions, "Induction. It will be a real treasure for you.... The topics raised in the book cover a wide range of issues, ranging from simple combinatorial problems to more complex concepts such as the inclusion-exclusion principle and combinatorial proofs. Vilenkin is not afraid to delve into the details, which allows the reader not only to master the material, but also to develop critical thinking. He emphasizes the importance of induction as a method of proof, which makes the book relevant not only for the study of combinatorics, but also for the wider areas of mathematics. Style N. I. Vilenkina is distinguished by clarity and accessibility. It skillfully combines a rigorous mathematical approach with a living language, making reading easy and enjoyable. His other well-known works, such as Elements of Number Theory and Fundamentals of Mathematical Logic, also demonstrate his ability to explain complex topics in plain language, making him one of the most respected authors in the field of mathematical education. If you are looking for a book that will not only expand your knowledge of combinatorics, but also help develop logical thinking, "Induction. Combinatorics" will be a great choice. It will inspire you to new discoveries and teach you how to apply mathematical methods in different situations. Do not miss the opportunity to immerse yourself in the world of mathematics with H. I. Vilenkin is a journey that will leave you with new knowledge and a deep understanding of combinatorial structures.