"Hang onto it until I got home, and then study it!" says Bella cheerfully. "There's no good way for non-wizards to learn about wizard spells, but the best way is to take apart the staffs and see what's in them. The next best way is to marry a wizard and pretend to be deaf so he'll talk to his friends in front of you, and some fine books on wizard magic have been produced that way, but I do not care for the methodology."