In the ruins of level 4 on this quest -- where you get the magic book... there's a game-ruining bug... if you die or restart and go to continue the game, it automatically restarts on the end screen where the triforce normally would be in any level (in this case, where the magic book is) and then link is invisible and you can't move or use items or change screens... so, now every time I go to play, it opens on that screen and I can't do a thing.
anyhow, I liked this quest, but now I don't feel like restarting and playing up to this point again. Yeah, despite this terrible bug, I liked the quest. Oh, and I noticed this bug earlier in the game, but I selected "Retry" and was able to go back to an earlier point. Not anymore, because I saved already.