The life of Abu Bakr al-Siddiq, the successor of the Prophet and the first caliph of Muslims, is one of the golden pages of Islamic history. In the entire history of mankind it is hardly possible to find a second such page - a page that contained so much faith, sincerity, dedication and selfless courage, a page that contained such a heroic struggle in the name of high ideals, the triumph of the religion of the Almighty and its spread. A book by a famous modern Muslim scientist ' Ali Muhammad al-Sallabi, which you hold in your hands, is convincing proof that Abu Bakr al-Siddiq was truly a great man. Everything about him was great - his faith, his knowledge, his thoughts, his eloquence, his character. Great were his words and deeds, his achievements and the impact he had on the world and on the people around him. And the source of this greatness was his understanding and practical application of Islam - the religion of the Almighty, his close and inextricable connection with the Lord and unswerving adherence to the Sunnah of the Messenger of Allah. Abu Bakr is one of the great leaders whose sunnah we must adhere to. Their words and deeds are a wonderful example for us. Reading the biography of Abu Bakr will help the reader learn more about Islam and get an idea of the era in which the Prophet Muhammad and his noble companions lived.