Obadiah

Obadiah is simply an oracle against Edom. Remember that Edom is the nation that descended from Esau, so they are in a sense the opposite of Israel (Jacob). God is punishing them for taking advantage of Judah during the Babylonian conquest (10-14). It's weird because in 6-9, he talks like the judgment of them is past tense. Then in 12-14, he is telling them not to do things to Jacob that they have seemingly just done, future tense. So that was just kind of weird. Again we're back to the day of Yahweh (15), which will include judgment for all the nations, not just Israel. This is a reminder that God is the ruler of every nation.