Allāma Amini is most famous for his research project al-Ghadir which offers an in-depth analysis of the appointment of Imam Ali at Ghadir Khumm and the series of events that followed. Born in Tabriz in 1902, Allama 'Abd al-Husayn Amini developed a passion for knowledge from a young age under the tutelage of his father. At aged 14 years, he moved to Najaf to pursue his studies further. Dr. Fakhr-Rohani's biography is the first of its kind written in English. It describes Allama's early influences, analyses the research methods used in al-Ghadir, and relates anecdotes from those closest to him, thus uncovering the secrets behind Allama Amini's devotion to the truth.