Kamaaluddin Wa Tamaamun Nema - Vol 1, authored by the eminent Islamic scholar Sheikh Saduq, is an essential text that introduces the concept of Imamah and divine leadership. This first volume lays the foundation for understanding the importance of the final Imam, Imam Mahdi (A.S), focusing on the theological and historical aspects of his birth, lineage, and significance in Islam. It discusses the challenges faced by the Shia community after the occultation of the Imam and explains the reasons behind both the Minor Occultation (Ghaybat al-Sughra) and the Major Occultation (Ghaybat al-Kubra). Sheikh Saduq provides scriptural evidence from the Qur’an and Hadith, as well as rational arguments supporting the existence and eventual reappearance of Imam Mahdi (A.S). The book also addresses various doubts and objections raised about the occultation and answers them with clarity, making it a valuable resource for scholars and believers alike.