1) Readying a grimoire requires a fast action. Does this need to be done every time you cast a spell? (With the action symbolizing reading the spell off the page.) Or does the action symbolize flipping to the correct page of your grimoire, so that you don't need to take the ready action the next time you cast the same spell?
2) How many hands does a grimoire require? Can you cast spells with your grimoire in one hand and a weapon or shield in the other hand?