First off head to The Plane of Knowledge or the Nexus, and talk to Gilgamesh. Pick up the task from him (for tracking the quest items/locations).
You will need 8 items in total to get your new epic weapon.
You can obtain these books by slaughtering everything you see in the appropriate zone.
Next you will need:
This is a Tier 6 fight.
This is a Tier 6 fight as well.
Combine all the items in your Universal Assembly Crate, and turn the Book of Epic Power - 3.0 into Gilgamesh in The Plane of Knowledge or the Nexus.
Rewards