What is the letter to Ephesians?

A:

The book known as the Epistle to the Ephesians is actually not a letter at all, but an encyclical to all Christians. The oldest and best manuscripts do not have the address to the Ephesians.

It was written during the 80s of the first century and many passages in the letter seem to be directly copied from Colossians, another pseudo-Pauline epistle written around ten years earlier.