An Epic Quest Cass, Jack, Aly, and Marco are on a mission to the Seven Wonders of the Ancient World in order to save their lives?and the world. A Missing Friend After they defeated the Colossus of Rhodes and captured the first Loculi, Marco disappeared, along with everything they'd fought so hard to find. A Lost City With no leads, no clues, and no one else to turn to, the remaining Select have no choice but to trust Bhegad again and head off to find the lost city of Babylon. Seven Wonders The thrills continue as they discover something no one else can see and find out that they're not the only ones out to uncover the magic of the Seven Wonders.