I like book II a lot. Balance is grate, it's interesting to play. You made a great job!
And I have suggestion about book III.
Fixed items. In my opinion, if you meet some special creature (or found and opend great chest), and it fights with big magick ax, it is nice to take it as a prise, when you defeat it. This level of items should never be selled in shops.
The same is with chests and quests
Identifying items will save balance, and items can be different with player's orientation.
At least, there can be more tight rotation of items in some places