Owen Brown is your average fourth grader. Or he was, until his best friend, Dana, disappeared right in front of his face, through the floor of the school. Owen's average life has turned upside down. He's determined to find Dana -- before anyone realizes she's missing. Owen sets out on a mysterious, mythological rescue mission with his friends Jon and Sydney. But what none of them know is that Dana's disappearance is part of a much larger riddle. And...

An action-packed, mythological chapter book series from Tony Abbott! The underworlds are rising -- and no one is safe.Loki is waging war, and Pinewood Bluffs is about to become his battlefield. Owen, Dana, Jon, and Sydney know they have to stop him. They'll do whatever it takes.But when they stow away in Loki's sledge and emerge in a new, mysterious underworld they know nothing about, things get complicated. The Babylonian underworld is dark as night...