 Two Hebrew translations (Sefer ha-Ruah v’ha-Nefesh) and a fragment of the Arabic original remain of this work. Altmann and Stern provide a critical English translation based on the Hebrew manuscripts (Munich Steinschneider’s Cat. no. 307, fols. 47ff; Cambridge Addler 1858 fols. 113v ff.) and A. Borisov’s publication of the Arabic fragment in Isaac Israeli, pp. 108–117.