Overview Of Coptic Literature

I came across the following pdf, An Overview of Coptic Literature, at http://www.coptic.org/language/overview.pdf at the Coptic.org site. It looks like a pretty thorough listing of existing material in Coptic, including some ancient Egyptian religious material than exists in Coptic translation. Oddly, it speculates that the Gospel of Thomas might be Manichaean rather than Gnostic (not to mention that Thomas probably isn't even Gnostic Gnostic.) I hadn't heard that one before.