"You find a book that seems to contain some sort of magical instructions. Unfortunately you can't make any sense of them. Casting a spell you don't understand is always more dangerous than not casting it at all. You replace the book on the shelf".
This is the message I get when I'm at the bookshelf that supposed to teach me Avatar, instead of the "Congrats, you now know Avatar!" message or whatever. I have only two characters who can do Priest Spells, one of whom is up to Level 7 already, and one who isn't. What in the blue blazes do I need to do to get this spell?! Do both my Priest-casting characters need to be L7? Do I need to increase anyone's intelligence?