Right here of course! The Artificer's office has a wide variety of books that give a general overview of the eight schools of magic, and basic information on a wide variety of spells — there's also the Academy, if McCree feels like sitting in on some intro courses, or bugging one of the instructors there.

This is all just a hunch, of course. If there's any actual credence to this Miss Zarves tale that's whipping up the entire Moon Base, if there was some unseen force somehow riling everyone up, then magic would be the most likely culprit, right?