Gospel of Peter to be the work of the Apostle Peter: However, scholars generally agree that Gospel of Peter is pseudepigraphical (bearing the name of an author who did not actually compose the text). The true author of the gospel remains a mystery. Although there are parallels with the three Synoptic Gospels, Peter does not use any of the material unique to Matthew or unique to Luke. Raymond E. Brown and others find that the author may have been acquainted with the synoptic gospels and even with the Gospel of John; Brown ("The Death of the Messiah") even suggests that the author's source
Treatise on the Resurrection texts found at Nag Hammadi. It alludes to the account of the Transfiguration found in Mark, saying, "Do you remember reading in the Gospel how Elijah and Moses appeared?" Hence, the text indicates that the author accepted Mark's synoptic gospel narrative as a sacred text. Unlike many other texts found at Nag Hammadi, The Treatise on the Resurrection is not pseudepigraphal, since the author does not pretend to be a great apostolic figure who received a special revelation. The text is simply a letter to someone named Rheginos, and hence belongs to a genre more akin to the New Testament