The books of , which are in the New Testament, are both letters to a church that Paul the apostle helped establish in the biblical city of Thessalonica. First Thessalonians is agreed by biblical scholars to be written by Paul. The author of II Thessalonians, however, is still being debated about. In II Thessalonians itself, and in secondary sources, there is evidence to support the theories that Paul wrote II Thessalonians as well as the first letter but also that someone wrote II Thessalonians in his name. First Thessalonians was written ....