Dov Baer ben Shneur Zalman of Lubavitch (The Mitteler Rebbe). Derech Chaim VeTochachath Mussar Haskel. With Sha’ar HaTeshuvah and Sha’ar HaTephilah.

First edition of a fundamental text of Chabad Chassiduth. The work may be viewed as an expansion of the Alter Rebbe’s Igereth HaTeshuvah, the third part of the Sepher Tanya. The Author inherited the mantle of leadership from his father, R. Shneur Zalman of Liadi, founder of the Chabad School of Chassiduth. Fondly known by his Chassidim as the “Mitteler Rebbe,” it was he who established the center of Chabad in the Russian hamlet of Lubavitch, residence of his father-in-law. Typographical variants of the title of the work exist, nonetheless, Habermann, Wiener and the late Chabad bibliographer, Chaim Liberman all concur that the first edition was published in 1819.