This comprehensive study by Dr. Muhammad bin Abdul Rahman Al-Muhaize' delves into the origins and evolution of jurisprudential issues within the Hanbali school of Fiqh. Focusing specifically on the 'Book of Purification' (Kitab al-Taharah), the author meticulously traces the development of rulings from their inception. This substantial 2025 edition, spanning 816 pages, is beautifully presented with an art cover on high-quality chamois paper. It serves as an essential resource for students and researchers of Islamic law, especially those specializing in the Hanbali madhhab, offering deep insights into its methodologies.