The book of 2 Thessalonians is a letter written by the Apostle Paul to the church in Thessalonica, addressing concerns and misconceptions about the second coming of Christ and the day of the Lord. It serves as a follow-up to his first letter, providing further clarification and encouragement to the believers in Thessalonica who were facing persecution and confusion regarding eschatological events.

Paul, the writer of this epistle, is one of the most prominent figures in the New Testament, known for his missionary journeys and theological contributions. He wrote this letter while in Corinth, likely around A.D. 50-51, during his second missionary journey. The Thessalonian church was established during his first journey, and Paul had a deep affection for these believers, which is evident in his writings.