Kitab al-Ghayba (al-Nu'mani)

The Kitāb al-Ghayba (Arabic: كتاب الغيبة, lit. 'Book of Occultation') is a book by the 10th-century Shia scholar Muhammad ibn Ibrahim al-Nu'mani on the subject of the occultation of the last Twelver Imam Muhammad al-Mahdi in 873–4 (260 AH).