The textbook "Nacal'nyj kurs, Ucebnik - A textbook. Pt.1" by Esterum is aimed at adults who wish to learn the Russian language. It is specifically designed for beginners and offers a structured approach to the fundamentals of the Russian language. The content is intended to provide learners with a solid foundation to gradually develop their language skills. The book includes various exercises and materials that support the learning process and promote the application of the language in practical situations. With a clear and understandable layout, it is ideal for use in self-study or in the classroom. The combination of theoretical knowledge and practical exercises makes it a valuable companion for anyone looking to become familiar with the Russian language.