The book '2 כרכים - שבתי צבי והתנועה השבתיאת בימי חייו' delves into the life and influence of Shabbatai Zvi, a 17th-century mystical and controversial figure who claimed to be the Jewish Messiah. It explores the Sabbatean movement, which had a profound impact on Jewish communities and provoked significant controversy and division.
