The Old Testament can be divided into the different types of books—History, Wisdom, and the Prophets. The Prophets feature the major prophets (like Isaiah) and minor prophets (like Obadiah). Obadiah was called a minor prophet because he was really short. Two feet tall. Just kidding. He was called a minor prophet because his book is really short. One chapter. Isaiah has sixty-six chapters! But what united all the prophets was their message. They warned people that God was going to judge their hard hearts and wicked sins. They held out hope of a time to come when God would make everything right. And they foretold a coming Deliverer, who would forgive sins, defeat enemies, and bring in God’s perfect kingdom. Simply put, when God had something to say, the prophets were God’s messengers. When God had something important to say, they spoke for him. It was an exciting job. Imagine hearing directly from God! But it was also a tough job. People didn’t like hearing the message that they were sinning and would be judged. This was certainly true in Isaiah’s day. But the book is filled with good news about a coming salvation for the whole earth and all who live in it.