In 'The Theological Impact on the Science of Usul al-Fiqh,' Al-Sa'eed Sobhi Al-Eisawi offers a profound academic exploration into the intricate relationship between theological discourse (kalam) and the foundational principles of Islamic jurisprudence (Usul al-Fiqh). The book meticulously examines how theological methodologies and concepts permeated the development and articulation of Usul al-Fiqh, shaping its theoretical framework. A central theme is the author's critical engagement with the perspectives of Abu al-Muzaffar al-Sam'ani, a prominent scholar whose views provide a unique lens through which to understand historical debates and intellectual currents. Al-Eisawi’s work provides valuable insights for scholars and students alike, offering a comprehensive analysis of this crucial intersection.