The epic conclusion to The Atomic Sea saga Dark times have befallen not only Dr. Francis Avery and his friends, but the entire Ysstral Empire. The world itself is in dire peril. A treacherous duke has usurped the throne and seized the realm for his own, forcing Avery and the others into hiding. On the run, how can they hope to overcome the duke and restore order to the realm?They'd better hurry. The duke's new allies, the evil Collossum, are up to...