In 'Custom and Sharia,' Sami Al-Riyahi delves into the intricate and often nuanced relationship between customary practices (العرف) and Islamic law (الشريعة). This insightful work explores how various societies historically integrated local traditions with the overarching principles of Islamic jurisprudence. Al-Riyahi meticulously examines the points of convergence and divergence, highlighting instances where custom has either complemented or challenged religious injunctions. The book provides a comprehensive analysis of scholarly debates on this topic, offering a critical perspective on the evolution and application of legal thought within Islamic contexts. It is an essential read for anyone interested in Islamic studies, legal history, or the sociology of religion, providing a profound understanding of the dynamic interplay shaping Muslim communities globally.