Allama Majlisi's Kitab Al Ghaybah presents a thorough exposition on the doctrines surrounding the Major and Minor Occultation of Imam Mahdi (a.s.). This book explores the religious, social, and eschatological dimensions of the Imam's hidden existence, interpreting key narrations and scholarly discussions. Majlisi’s work emphasizes the significance of the hidden Imam’s return as a pivotal event in Islamic theology, intended to bring justice, establish divine rule, and fulfill the ultimate promise of Allah. This text is instrumental for understanding Shia eschatological beliefs regarding the Imam’s reappearance and the redemption of humanity.