In these two volumes published by the OU and NCSY, he asks hard questions about Judaism and its commandments, and he gives compelling answers that have broadened the horizons of countless people.VOL I: Maimonides' Principles / The Real Messiah/ The Infinite Light / If You Were G-d VOL. II: Waters of Eden/ Tzitzith / Tefillin / Jerusalem / Sabbath, Day of Eternity