This book is a comprehensive biographical and scholarly work about Imam Ahmad ibn Hanbal, one of the four major Sunni Islamic jurisprudence school founders. The book explores the life, scholarly contributions, theological positions, and historical significance of Imam Ahmad ibn Hanbal, detailing his role in Islamic scholarship, his resistance during the Mihna (inquisition) period, and his profound impact on Islamic jurisprudence and hadith sciences. It provides an in-depth analysis of his methodology, personal character, and intellectual legacy within the Islamic scholarly tradition.