The Secret Book of James: Gnosis Beyond the Resurrection

The Secret Book of James (also known as the Apocryphon of James), discovered in the Nag Hammadi library, is one of the most compelling examples of suppressed Christian scripture. Framed as a secret letter from James the Just (Jesus's brother) to an unidentified third party, it claims to contain revelations given by Christ to James and Peter during a massive 550-day period after the Resurrection.

Unlike the simple, authoritative tone of the canonical New Testament, this Gnostic-leaning text presents a mystical, challenging, and often deliberately confusing dialogue.

source:
http://www.gnosis.org/naghamm/jam-meyer.html