John W. Martens is professor of theology and director of the Centre for Christian Engagement at St. Mark's College at the University of British Columbia in Vancouver, Canada. He is a general editor of the newly published Liturgy and Life Study Bible. Paul V. Niskanen is professor of theology at the University of St. Thomas in St. Paul, Minnesota. He is the author of Isaiah 56-66 in the Berit Olam series.