I am curious how to get the Lv 67 and 69 Skill Optimization Books, anybody knows?
I know the 66, 68 and 70 can be obtained from the event merchant, but not the 67 and 69, where are they hiding 
Lv 67 and 69 skill optimization book
-
Good question!
Some players said With lots of luck
from Mystery Merchant in world or in dungeons.
