Most Lore and Legend Quests can be started either with a book or by examining one of the quest items. Find the book, Atrebe's Sniveling Children, using the location information above. Next, read the book, Atrebe's Sniveling Children, flip through all the pages, and accept the quest. Once you have accepted the quest you may place the book in your house. You do not need the book to progress the quest.
Steps
Find the following auto-updating pieces by killing Di'Zok in any zone:
Di'Zok Spine
Di'Zok Brain
Di'Zok Spirit
Find and examine the following tradeable pieces obtained by looting Di'Zok in any zone, or buying them from other players