The book "Tasks of the St. Petersburg Mathematics Olympiad 2019" , written by a team of authors - Berlov, The Brave , Kochas and Ivanov , It is a unique collection ,. which not only immerses the reader in the world of mathematical problems , but also opens the door to a deep understanding of logic and creative thinking. This work will become a real treasure for anyone interested in mathematics, whether schoolchildren, students, teachers or just lovers of intellectual challenges. The St. Petersburg Mathematics Olympiad is an event that annually gathers the most talented young mathematicians from all over the country. In 2019, participants were faced with tasks that tested not only their knowledge, but also their ability to think outside the box. The book includes all the tasks of the Olympiad, as well as detailed decisions and comments, which makes it an indispensable tool for preparing for such competitions. The reader will be able not only to get acquainted with the tasks themselves, but also to understand how to approach them, what methods to use and how to develop their analytical abilities. This book will be interesting to a wide range of readers .. Students preparing for the Olympics or exams will find useful materials for training in it . Students studying mathematics at a deeper level will be able to use it as an inspiration for solving more complex problems. Teachers of mathematics will appreciate it as an excellent resource for creating interesting lessons and tasks for their students. In addition, lovers of puzzles and logical tasks will find in it a lot of fascinating tasks that will help develop their mental abilities. The topics raised in the book go beyond simple mathematical calculations. The authors focus on the importance of a creative approach to solving problems, on how mathematics can be not only a science, but also an art. In each problem there is not only an answer, but also a story that can be told through numbers and formulas. This makes the book not just a textbook, but a real guide to the world of mathematical creativity. The style of the authors is clear and accessible. They are able to explain complex concepts in simple and understandable language, which makes the book attractive to a wide audience. Berlov, Khrabrov, Kochas and Ivanov are not only experienced mathematicians, but also talented teachers, which allows them to effectively share their knowledge. Their previous work has also been praised by readers and critics, which confirms their authority in the field of mathematical education. The book “Tasks of the St. Petersburg Mathematics Olympiad 2019” is not just a collection of problems, but a whole world worth diving into. It inspires the study of mathematics, develops logical thinking and teaches problem solving, which is an important skill in any field of life. If you are looking for a way to improve your math skills, broaden your horizons, or just spend time usefully, this book will be an excellent choice. Do not miss the opportunity to discover the fascinating world of mathematics together with talented authors!