This book was included in Ghost of The Tribunal from the Creation Club
My sources tell me the courier in charge of carrying the mask is a Redoran Guard.
It seems, however, our guard has plans of his own for the mask. He’s arranged a meeting with a buyer after midnight, in the cellar of the Old Attius Farm.
His greed angers the Goddess. Dispose of them both and return the artifact to her rightful hands.