Gobby Demon, in the room blocked by the Orange shield door. To open, players must use the Orange stick thing. Don't run away too far, or he'll hit you very hard, but move out of the way when he creates the portals that damage you.
When read, the tome will present the player with three options:
If Strength is selected, players will receive 75,765 experience in Strength.
If Not Strength is selected, Thok will say "You made mistake? You mean Strength. Thok only teach Strength. Thok is strong, no need for other skill than Strength."