The work was published originally as Torah Or, with treatises covering Genesis and Exodus, the first two books of the Pentateuch. The second half was published at a later date under the title Likutei Torah, covering Leviticus, Numbers and Deuteronomy, the final three books of the Pentateuch.
The second volume of the work, Likutei Torah, was published by Rabbi Schneur Zalman's grandson, Rabbi Menachem Mendel Schneersohn, the third Rebbe of Chabad. Rabbi Menachem Mendel published his grandfather's teachings together with his own brief notes on various treatises.
An English adaptation of Lekutei Torah/Torah Or by Rabbi Yitzchak Dovid Wagshul was released in 2007 and March 2014. The 2007 adapted English edition translates and elucidates selected treatises from Torah Or, the 2014 edition includes treatises from Lekutei Torah.