Information from the Droag

You need to climb one of the 2 westernmost towers and jump from the top to the upper rock ridge, or run all the way around the island clockwise from the cloud station to reach him.
==Steps==
#Search the four towers on the Cacotoxic Stain for the books Aetryol spoke of.
#*First Book: - Book about Ravasects
#*Second Book: - Book about Corpse Candles
#Return to Aetryol Monsoon on in The Bonemire
==Rewards==
*Experience
*At least 
*Opens up 2 new quests: Colony and The Flame of the Corpse Candles
*You can get both these quests at the same time by hailing Aetryol Monsoon again