"Usool As-Shashi" is an Islamic book on the principles of Islamic jurisprudence (fiqh), written by the renowned Islamic scholar Abu Ishaaq Al-Shashi. The book is published by Al-Bushra Publishers, a well-known publishing house that specializes in Islamic literature.The book covers the fundamental principles of Islamic law and jurisprudence, including the sources of Islamic law (Quran, Hadith, Ijma, Qiyas), the classification of legal rulings (halal, haram, etc.), the principles of legal reasoning (usul al-fiqh), and the methodology of Islamic legal interpretation. The book "Usool As-Shashi" is a valuable resource for students and scholars of Islamic law and jurisprudence, as well as for anyone interested in learning about the principles of Islamic legal reasoning and interpretation. With its clear and concise explanations of complex legal concepts, this book is an essential reference for anyone seeking to deepen their understanding of Islamic law.