One who contributes from his wealth for the purpose of writing or publishing a sefer of a Tzaddik –
Behold, at any given time, and in any corner of the world, that a person studies from this sefer, the Tzaddik [on high] evokes merit on behalf of the donor through whom the sefer was disseminated.
—The Rebbe, Igrot Kodesh, vol 2
Transcriptions of the talks by the fifth leader of Chabad-Lubavitch, Rabbi Shalom DovBer Schneersohn, at various Farbrengens (gatherings) on special days of the year, with a detailed index.
The deepest mystical concepts explained in a broader and more detailed style than in formal discourses, with stories, examples of upright deeds and good practices, Biblical interpretation, and lively interaction with the guests at the Rebbes table.