ʻUmar bin ʻAbd al-ʻAzīz Book 2011 ʻUmar bin ʻAbd al-ʻAzīz ʻṢ ʻAlī Muḥammad Muḥammad Ṣallābī 1 readers PublisherDarussalamLanguageEnglishPublished2011 Politics and governmentCaliphsBiography