Recently published (and made available online) by the excellent Alin Suciu is his article “The Book of Bartholomew: a Coptic apostolic memoir” Apocrypha 26 (2015), 211-237.
The abstract follows:
The Book of Bartholomew (= Liber Bartholomaei) is one of the best-known apocryphal writings preserved in Coptic. The present article proposes that the text in question belongs to a peculiar genre of Coptic literature : the memoirs of the apostles. This category consists of reports attributed to the apostles concerning various topics, all related to Coptic piety and liturgical life.
Within the article he explains that a major reason for the production of these pseudepigrapha was the aetiology of feasts within the Coptic calendar. He also refers to a statement prefacing a collection of pseudepigrapha attributed to the biblical patriarchs that Athanasius had discovered them among ancient apostolic decrees (nisyntagma narcheos). This, he shows, is a common trope; I have already referred to Suciu’s making me aware of such a statement in the preface to a pseudo-Chrysostomic text, and he details others within his article.
Whereas this is an Egyptian phenomenon, further light is shed on the context of pseudonymous production shared by the church orders. It is also interesting that apostolic sanction is sought for liturgical practice, again a mark of the church orders.