In an large size 8 volume set, 'Perfecting the Names of Men' by al-Hafiz al-Mazzi (654/1256 / 742/1341). This is an editing and expansion of the work of al-Hafiz al-Maqdisi, a biographical work on hadith narrators mentioned in the six canonical hadith collections. Al-Mizzi edited and abridged al-Maqdisi's work - it contains biographies of 8,640 narrators including Companions.