Kalynna Lathred wants you to retrieve the Tome of Dusk from Grand Warlock Nethekurse in the Shattered Halls of Hellfire Citadel and the Book of Forgotten Names from Darkweaver Syth in the Sethekk Halls in Auchindoun. This quest must be completed in Heroic difficulty.
I left the Kirin Tor in pursuit of knowledge forbidden by those of my order; it is beyond ironic that I am now asked to assist them with that very same knowledge.
If I'm to perform this favor for you, you will have to do something for me first. I want you to obtain two of the tomes I've been searching for.
The first one is called the Tome of Dusk and is owned by the orc warlock known as Nethekurse. The second, known as the Book of Forgotten Names, belongs to the arakkoa known as Darkweaver Syth.