Knowing the Ma'sumin: Imam Muhammd al-Mahdi (af) is part of the series of workbooks on the Ma'sumin (a). The workbook activities are designed to teach children ages 8-12 years the bigraphical details about the Present Living Imam, the great teachings of Imam al-Mahdi, the Du'as we recite for his appearance, his minor and major ghaybah and the great jurists who serve during his occultation.