This long-awaited siddur presents for the very first time the insights on Jewish prayer of one of the twentieth century's greatest Jewish philosophers, scholars and religious leaders, Rabbi Joseph B. Soloveitchik, widely known as "The Rav."

The Koren Mesorat HaRav Siddur features brilliant commentary based on the teachings of Rabbi Soloveitchik, an eloquent, contemporary English translation by Rabbi Jonathan Sacks, and extensive introductions to the thought of Rabbi Soloveitchik by Rabbi Aharon Lichtenstein, Rabbi Sacks and others. Edited by Dr. Arnold M. Lustiger; published in partnership with the OU Press.