Kingdom Keepers VI: Dark Passage is the sixth book in the Kingdom Keepers series. It acts as a second half to Kingdom Keepers V: Shell Game. Released on April 2, 2013, KK6: Dark Passage finds the Kingdom Keepers as they continue aboard the inaugural voyage of the Disney Cruise Line ship. The Kingdom Keepers discover that Maleficent and the Overtakers, are plotting a catastrophic event that could have repercussions far beyond the world of Disney. Aboard the ship, the Keepers and their holograms uncover a puzzle hidden within the pages of a stolen journal. A destructive force is about to be unleashed — and the Kingdom Keepers will become its first victims.