With a piercing voice and a troubling message, the Old Testament prophet Amos delivered God's summons to "do what is right" to a people satisfied with their religiosity and oblivious to the injustice, oppression, and immorality that were eroding their society's very foundations. Robert Baker's insightful interpretation of Amos reveals that the prophet's voice still pierces and his message still troubles those who have forgotten, ignored, or never heard God's call to "let justice roll down like waters, and righteousness like an ever-flowing stream" (Amos 5:24).