The liturgy of the Jews of Morocco is unique among Sephardic liturgies. Over thousands of years, each geographic region within Morocco, from Marrakesh to Fez and Casablanca, developed its own prayer customs and melodies. In recent years, the distinctions among the geographic traditions have become blurred, and unique customs and prayers lost. The Koren Avoteinu Siddur is a complete Moroccan Siddur for weekdays and Shabbat that includes: explanations of, and sources for geographically-varied customs, commentaries from the Moroccan sages and language and pronunciation guides.