Ma'aseh Livnat Ha-Sapir ("The Work of Sapphire Stone) is a mystical-philosophical treatise by Jewish thinker Salomon Maimon (1753-1800). Believed to have been lost in the Holocaust, the Hebrew manuscript roughly dated to 1778 is held today at the Israel National Library in Jerusalem (MS Heb. 8o 6426).The manuscript is transcribed and translated into English for the first time. The work stands out as Maimon's only foray into the realm of Jewish mysticism,...