The work ascribed to him, Megillat Ester, an answer to Nahmanides' criticism of Maimonides' Sefer ha-Miẓwot, has been proved by Azulai to belong to Isaac Leon ibn Zur, a later writer.
The work known as Megillat Ester, which is a response to Nahmanides' critique of Maimonides' Sefer ha-Miẓwot, has been identified as being written by Isaac Leon ibn Zur, a writer who came after the original author.