|Michael Brock Global Organized Play Coordinator|
What do we do with spellbooks we find in game? (E.g. can we copy non-core spells from them?)
If we find a scroll of a non-core spell, can we use that to scribe a non-core spell into our book? If no, what if the scroll is on the chronicle sheet?
As far as the question regarding what happens if someone is using a non-core ability in a core game, when one determines that I would imagine you would handle it the same way that you do when you realize someone is using something not allowed in a regular game by mistake. (i.e. something not on additional resources)
Look at my second reply in this thread for an answer to spell books.
Yes, if you find a scroll, it can be used to scribe into a book. Just have the GM make a note on the Chronicle.
For your third point, see my answer directly above this one.