1991 0-7734-9681-5 A survey of the manuscripts and printed editions of Sefer Ha-Yashar, one of the most complex spiritual and religious phenomena in 13th-century Judaism. It is one of the most important treatises in the history of Jewish spirituality, in which ethics merges with mysticism. Deals with the concept of God, Creation and problems of Evil, the illustration of Man and his Soul, and the theme of Love and Fear of God and Devekut in Sefer Ha-Yashar.
1995 0-7734-9407-3 This volume is a scholarly treatment which examines the ideological, mystical, and philosophical components of Repentance in Judaism. Each of the eleven chapters focuses on a different major approach to the central problem of repentance, representing the most significant and representative encounters to be found in Jewish thought during the past millennium. Topics include 10th century writer Rav Saadia Gaon; Bachya Ibn Paquda; Maimonides' Hilkhot Teshuvah; Sefer Hasidim and Sefer Ha-Roke'ah; Rabbi Jonah of Gerona; Sefer Ha-Yashar; the 13th century magnum opus of Kabbalah, The Zohar; the Lurianic movement; Maharal of Prague; 18th and 19th century Hasidim; and Rab Avraham Yitzhak Ha-Cohen Kook. This study is in Hebrew throughout.