Rabbi Zev Leff is a world-renowned lecturer, writer and halachic authority.  He serves as the Rav of Moshav Mattisyahu, Israel.

His latest book release, Shemoneh Esrei: The Depth and Beauty of our Daily Tefillah (Targum Press, 2008) is a 560 page masterpiece which offers readers the ultimate book on the Jewish daily prayer; focusing on the deeper meaning behind each berachah and core concepts of Jewish beliefs.