Sa'adya Gaon. Sefer ha-Emunot ve-ha-Deot (philosophical work, translated into Hebrew by Yehuda Ibn Tibbon). Amsterdam, Josef Ben Israel, (Menasseh Ben Israel), 1647, 18.6 x 14.3 cm. 53 leaves, Latin title page soiled, partly detached, owner's inscription, browning, hand-written numbering of the lines in each page with red ink, old marbled boards, rubbed.