Early Christian text containing Gnostic knowledge, as supposedly revealed to John the Baptist by Jesus.

The Apocryphon ('Secret Book') of John contains the most extensive detailing of classic Gnostic mythology known, and is one of the principle texts of the Nag Hammadi library; as such, it is an essential text of study for any party interested in Gnosticism. The mythology it details has been the object of study of numerous modern figures, including Carl Jung and Eric Voegelin. More recently, Tori Amos drew on the Gnostic mythology described in the Apocryphon of John in her album, 'The Beekeeper'.