The book offered to the attention of readers tells about the foundations of Islamic doctrine and religious practice, about the main sources of Muslim thought - the Koran and Sunnah, about the ethical system of Islam; the concepts of Muslim morality are revealed and brief information is provided about the place of Islam in the modern world. When covering issues of the ideology of Islam, the author objectively presents the point of view of representatives of both madhhabs - Sunnis and Shiites, thus recreating the most complete image of this rapidly developing religion. The book is intended for a wide range of readers.