II Thessalonians is the ninth of Paul's Epistles. It was written to the Christian Church in Thessalonica shortly after Paul's first letter to them, around 52 AD.
News had come to Paul that some people in Thessalonica had misunderstood what Paul had said about Christ's second coming. Because they believed that Christ might return at any moment, many of them had given up their jobs and were sitting around waiting for Christ to return. Christians were also being persecuted and many thought that the days in which they lived must be the last days. II Thessalonians is Paul's response to hearing this news.