This scholarly work by Prof. Dr. Ribhi Mustafa Alayan delves into the rich history of libraries within the Arab-Islamic civilization. The book meticulously examines the establishment, organization, and profound cultural impact of these vital institutions, from the early caliphates to later periods. It explores various types of libraries—public, private, and those attached to mosques and schools—highlighting their role as epicenters for translation, scientific research, and the preservation of knowledge. Alayan provides a comprehensive overview of how these libraries fostered intellectual growth and became pillars of a flourishing civilization, making this an essential read for historians and researchers.