The author Şeyḫ-zāde Meḥmed b. ‘Abdu’r-raḥmān es-Sirvezī, known in scholarship as Şeyḫ-zāde, is the author of the second of two renditions of the Forty Viziers narrative (or, Ḥikāyet-i Ḳırḳ Vezīr). According to the introduction in some manuscripts, the work named Ḥikāyet-i Erba‘īn Ṣubḥ u Mesā - the title of Ahmed-i Mısrî's Forty Viziers texts - was used as the source text for Şeyḫ-zāde's composition (see the catalogue page for St Andrew's 'Islamisation of Anatolia' project). Şeyḫ-zāde reportedly made some additions and changes to Ahmed-i Mısrî's text, and presented his version both Murād II (1404-1451 CE), and Meḥmed II (1432-1481 CE).