This quest is not available in game.
Retrieve the Compendium of the Fallen from the Monastery in Tirisfal Glades and return to Sage Truthseeker in Thunder Bluff.
The Earthen Ring had pure intentions towards our plagued brethren. But who is to know the motivations of those whispering in the ears of the Elder Council?
The Forsaken whom we have allied with have a history wrought with deceit. Too hasty was our pact. Perhaps Cairne would have been wise to heed the warnings from Orgrimmar.
Deep within the Scarlet Monastery lies the Compendium of the Fallen, guarded by crazed human zealots. Their method is forged from insanity but their research might prove useful.