This collection of book reviews examines two significant scholarly works on rabbinic Judaism. Jeffrey L. Rubenstein's "The History of Sukkot in the Second Temple and Rabbinic Periods" addresses how the destruction of the Temple transformed the celebration of Sukkot from a primarily cultic festival to a rabbinic observance. Rubenstein employs comparative methodology to analyze Second Temple worship practices against rabbinic traditions, revealing both continuity and discontinuity in ritual development. His analysis demonstrates that while the loss of sacrificial systems created an "identity crisis" for Sukkot, rabbinic Judaism adapted existing elements—the sukkah, lulav, and Hallel—rather than creating radical innovations. The second work reviewed is Jacob Neusner's "Rabbinic Judaism: Structure and System," which represents a culmination of three decades of textual analysis and translation of rabbinic literature. Neusner's methodology focuses on studying individual documents within their specific historical contexts rather than assuming broad continuities. Both works contribute to understanding how rabbinic Judaism developed as an adaptive religious system suited to post-Temple Jewish life, offering insights relevant to contemporary Jewish communities in both diaspora and Israeli contexts.