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| Petrovsky-Shtern discovers the Sefer haCheshek |
Introduction
Many are familiar with the Baal Shem Tov (Master of the Good name) but who was the Baal Shem Ra (Master of the Evil name)? I have drawn extensively from the research by Professor Yohanan Petrovsky-Shtern,[1] who in 1993, whilst senior librarian at the Vernadsky Library in Kiev, discovered an unusual manuscript, entitled Sefer haCheshek.
