Paul wrote about the return of Christ in what book of the Bible?

A:

In 1 Thessalonians, Paul says that he expected to still be alive at the second coming. He said the end will come like a "thief in the night," with Jesus appearing when people least expect it.

2 Thessalonians was written in Paul's name long after his death, when it was becoming clear that Jesus was not returning soon. The author of this epistle used Paul's name to explain that Jesus' appearance will be a while yet and, rather than coming unexpectedly, will be preceded by recognisable events.