Derech Mitzvosecha, also titled Sefer Hamitzvos (Hebrew: דרך מצותך: ספר המצות), is an interpretive work on the Jewish commandments authored by Rabbi Menachem Mendel Schneersohn (1789–1866), the third Rebbe of the Chabad Hasidic movement. The work is considered a fundamental text of Chabad philosophy. Source: Wikipedia (en)