Basically I have a book created that I would like to advance you to stage 15 of the quest if you are at stage 10. I have no idea how to do that. I also have a dialogue that gets you to stage 10 in the first place.
My problem is that in this dialogue with the NPC I created, when he thanks you for taking his quest it doesn't add the quest. I have added GetOwningQuest().SetStage(10) to the end field of that topic, and still nothing. Is there something else I need do to get the stages running properly?