BIONICLE Legends 6: City of the Lost

City of the Lost is the sixth Bionicle Legends book and will come out 2007.

Story
From scholastic.com: The Toa enter an underwater world in which six new villains hold sway. Can the Toa navigate their way past the rocky shoals of this environment and complete their mission? Or are they doomed to a watery grave?

Quotes

 * Pridak stood on the tower of his island fortress, looking down at his assembled army. His troops came from an endless number of places. Some were Matoran criminals, others ex-Dark Hunters seeking refuge from their former employer, and by far the majority were simply beings who did no long welcome in their homelands. They were thieves, murderers, traitors, and liars, and easily the most beautiful sight he had ever seen.