Bring the Reconstructed Tome and 3 Rods of Channeling to Strahad Farsan in Ratchet.
Well, ah, it's hard to let it go. But you found it, and you have more important things to do with it, of course. Just, please, be sure to mention to Strahad that I wanted a copy.
While you were out, he sent a message for you. He wanted me to tell you that for his acolytes to assist with the summoning, you'll have to acquire three rods of channeling.
He might not know where to find them, but I do! They were last used by the orcs of the Dragonmaw clan in the Wetlands. I'd check their spellcasters!