This quest is not available in game.
Return the items on the Bonegrip's Note to Gerrig Bonegrip in Ironforge.
Yagyin's Digest, eh? Are you starting a new chapter of us, somewhere? Never mind, it is not my place to ask.
I will help you, for I have an extra copy. We must aid each other, yes? That is how we flourish.
I require three items of power. Bring them to me and I will give you the digest.
I will not speak their names. Ears may be on us. But here, I will write them down.