This 2012 edition of 'Al-Mahsul fi 'Ilm al-Usul' by Fakhr al-Din al-Razi is a foundational text in the science of Islamic jurisprudence principles. Presented in an edition of 997 pages with an artistic cover, the book systematically delves into the methodologies for deriving legal rulings from primary sources. It is celebrated for its comprehensive scope and profound analytical depth, making it an indispensable resource for advanced students and scholars specializing in Islamic law, logic, and theology, exploring intricate arguments and establishing key principles within the field.