Mohamed Anwar Mersal examines jurisprudence regarding the sacred Islamic period in The Comprehensive Collection of Rulings on Ashura and Muharram, published by Dar Sayd Al-Khater. The text gathers textual proof from the Quran, prophetic traditions, and scholarly opinions to clarify proper religious practices during the opening lunar calendar interval and its tenth day. Legal positions, scholarly disagreements, and common deviations receive careful attention through rigorous documentation. Readers find clear guidance on correct observance based firmly on established traditions, avoiding unauthorized innovations. The volume serves individuals seeking accurate religious understanding through systematic legal analysis.