"Letters on the Education of Youth" is a famous pedagogical book written by the Portuguese educator Antonio Nunes Ribeiro Sánchez. In his letters, he shares important thoughts about the education of young people and points out the importance of education in the formation of characters and thinking. The author emphasizes the need to develop not only mental abilities, but also moral values in the younger generation. This book is a valuable source of advice and recommendations for parents, teachers and anyone interested in raising and educating young people. The publication is relevant and useful not only in the past, but also in the modern world, where topical issues of education remain an integral part of our lives.