When Ehrman wrote "Forged", he said in the book that he would follow up with a scholarly edition that would go into greater detail with citations.<quoted text>
This post probably needs a bit of clarification. I have never seen the term "pseudepigrapha" ever applied to the gospels. Perhaps it has been. But to me there is a distinction between an author who pretends to be someone else and a text that was not intending to deceive the reader about authorship but later was ascribed by others to another person to grant that text authority it might not otherwise garner.
The only texts in the NT that clearly are properly ascribed to the rightful author are the genuine letters of Paul. Others, such as Luke/Acts maybe properly ascribed, but not certainly so.
It came out in November, although I haven't read the book.
Forgery and Counterforgery: The Use of Literary Deceit in Early Christian Polemics