I simple give him the book. I'm not upset to loose 2 skillponts. I like to solve as much quests as possible, no matter what I can loose ... (but solving the quest give XP and gold and a random item)

That "Rivertown gorge" and Kali's FF (they're both one and the same place) is, I can fully remember, very confusing

!
And this is also only 1 big thing in this great game I find very annoying :
when you fly to Rivertown Gorge ... then automatically transported to that place (waiting till the loading time is ready) ... and then you must look out NOT to fly backwards or to much to the right or the left .. because then AGAIN "loading screen" (to Orobas Fjords) !
Very annoying, no?
WHY not "developed" in the same way as when you fly in the direction of poisonous Broken Valley (flying beyond the statue of Orobas, above the waterfall cave) ???
When you fly to that point a "message window pops up" asking you if you WANT to go there or not ... that's good
Sometimes, on my pc (or whatever), such message windows are annoying, but in this case (DKS) I really appreciate such a pop up window very much !
In Divine Divinity Larian did it also in a good way (going to Dark Forest or Verdistis, coming from the map of the Farmlands).