Igros Kodesh of the Rebbe Rashab
These volumes contain the letters written by the Rebbe Rashab (Rabbi Shalom DovBer Schneersohn), with added annotations, edited by Rabbi Shalom Ber Levin and published by Kehot Publication Society.
Beginning of the Work
After Shavuot 1981, Rabbi Levin received instructions from the Rebbe to begin collecting the letters of the Rebbe Rashab. He began gathering letters from the Chabad Library, from collectors, and other sources. Throughout that summer, there was correspondence between him and the Rebbe regarding how to edit the book.
Volumes 1-2
During winter 1982, Rabbi Levin (together with Rabbi Yosef Yitzchak Eidelman) edited these volumes and published them in spring, including indexes.
Volumes 3-5
After the conclusion of the Seforim case in winter 1986, Rabbi Levin discovered many additional letters from the Rebbe Rashab in the archive that had not yet been published. On 7th Adar II, he asked the Rebbe whether to publish additional volumes and received an affirmative response. These volumes were printed between Menachem Av 1986 and Tevet 1987. Volume 5 also included the Rebbe Rashab's halachic rulings and responsa.
Volume 6 (Supplements)
Published in 2012, edited by Rabbi Shalom DovBer Levin.
In 2022, Volume 6 was republished by Otzar HaChassidim with the text "Yechi" printed on the cover.