Unity of Corinthian Correspondence

In The Unity of the Corinthian Correspondence, David Hall argues that 1 and 2 Corinthians are closely related. In both letters, Paul faces the same opponents, referring to them in the same disguised, indirect way in both 1 Corinthians and 2 Corinthians 1-9 before confronting them directly in 2 Corinthians 10-13.