I completed the quest and was "nagged" 'Aren't you going to read the book?' The book was not in my Books, but the quest Gardener of Men is active. I can't do it, of course, because I don't
have the book. Have tried player.additem xx016e2c 1 but get the message that the script is not recognized.
I even tried setstage DLC2MQ05 1000 to end the Garden of Men quest and that script also was not recognized.

Any help would be appreciated, as it doesn't look like I can finish the main questline.