lookin for a d.a roberts book

I just finished Dark Frontiers: Cry of the Wendigo by D. A Roberts and started The Demon of Palo Duro Canyon. It feels like I’m missing a book. At the end of Cry of the Wendigo there was a reference to “Code Name: Wild Hunt: The Fall of the Grey Lady,” but I can’t find that title anywhere. Was it renamed, unpublished, or released elsewhere? #help # d.aroberts #fiction #cryptids