The earliest contact of Islam with Africa dates back to the period of A 'Umar b. Khattāb B. 'Uthmān b. 'Affān C . 'Alī b. Abī Tālib 'Ulūm ad-dīn is the titl...

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The earliest contact of Islam with Africa occurred during the reign of Caliph Umar ibn Khattab, who sent an expedition to conquer Egypt in 640 CE. The Muslims gradually spread their influence across North Africa and eventually into sub-Saharan Africa. As for the book "Ulum ad-din," it was written by Al-Ghazali, a prominent Muslim theologian and philosopher who lived in the 11th century. The book explores various aspects of Islamic theology and law, including the nature of God, the duties of Muslims, and the role of reason and intellect in religious belief. It is considered one of the most influential works of Islamic scholarship and has been studied for centuries by scholars and students alike.