The Trimorphic Protennoia is a Sethian Gnostic text from the New Testament apocrypha. The only surviving copy comes from the Nag Hammadi library (Codex XIII).
Books can be attributed to "Anonymous" for several reasons:
* They are officially published under that name * They are traditional stories not attributed to a specific author * They are religious texts not generally attributed to a specific author
Books whose authorship is merely uncertain should be attributed to Unknown.