The last twelve books of the Old Testament are known as "the Minor Prophets." They are "minor" not because they are less important than the other Old Testament prophets, but because their messages are generally shorter and more succinct. The Minor Prophets are filled with exhortations from men, moved by God, who spoke out against the social and cultural sins of their day. They called people to repentance. They challenged people to turn to God. Sometimes their hearers heeded the message, and sometimes they did not. And even though their voices have been silent for some 2,500 years now,...