Shlomo M. (Paul) Hamburger has published translations and explanations of several letters of Rabbi Levi Yitzchak Schneerson, father of Rabbi Menachem M. Schneerson (the Lubavitcher Rebbe). The letters are part of a series entitled: “Unlocking the Code: The Letters of Rabbi Levi Yitzchak Schneerson.” Each letter includes a short history and context for the letters as well as the author’s personal essays (or “take-aways”). The publisher and author are making available for free at this website downloadable versions of the letters.