Mosconi was well versed in philosophical works, both Hebrew and Arabic; but, having a predilection for metaphysics, he occupied himself particularly with Ibn Ezra 's commentary on the Pentateuch, on which he wrote a supercommentary. Most of the 30 supercommentaries on Ibn Ezra which Mosconi examined during his wanderings were, in his opinion, worthless. According to Mosconi, Ibn Ezra wrote _his_ commentary on the Prophets and Hagiographa before that on the Pentateuch, which he wrote 11 years before his death. <sep>, Pronoun: his <sep>, A: Mosconi <sep>, B: Ibn Ezra