Underworlds Series by Tony Abbott, Antonio Javier Caparo

An action-packed, mythological chapter book series from Tony Abbott!There's something lurking under Owen's school. . . .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... moreAn action-packed, mythological chapter book series from Tony Abbott!There's something lurking under Owen's school. . . .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 they're at the center of it. less

An action-packed, mythological chapter book series from Tony Abbott! The underworld is in our world now. . . . Owen, Jon, and Sydney managed to rescue Dana from the underworld. But if they don't fulfill their end of the bargain with Hades, she might be headed back -- forever. As if that wasn't bad enough, some very creepy, very one-eyed mythological beasts are on the loose... moreAn action-packed, mythological chapter book series from Tony Abbott! The underworld is in our world now. . . . Owen, Jon, and Sydney managed to rescue Dana from the underworld. But if they don't fulfill their end of the bargain with Hades, she might be headed back -- forever. As if that wasn't bad enough, some very creepy, very one-eyed mythological beasts are on the loose. Cyclopes have taken over the power plant in Pinewood Bluffs! Owen and his friends have to stop them before they destroy the town. But what chance do four kids stand against an army of mythological monsters? less

An action-packed mythology series from master storyteller 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... moreAn action-packed mythology series from master storyteller 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 and full of vicious monsters, including the dreaded Scorpion King. Will Owen and his friends ever make it back to Pinewood Bluffs? less

The epic conclusion to the action-packed arc!It all comes down to this.Owen, Dana, Jon, and Sydney have to prevent Loki from finding the powerful Crystal Rune. That means they need to find it first, no matter what. But tracking down the rune is only the beginning. . . .Loki is taking his battle for power to the world of the Norse gods -- and he's bringing an army of Underworldly creatures with him, including a fierce ice dragon... moreThe epic conclusion to the action-packed arc!It all comes down to this.Owen, Dana, Jon, and Sydney have to prevent Loki from finding the powerful Crystal Rune. That means they need to find it first, no matter what. But tracking down the rune is only the beginning. . . .Loki is taking his battle for power to the world of the Norse gods -- and he's bringing an army of Underworldly creatures with him, including a fierce ice dragon. The stakes are high: Dana's parents are missing, and Pinewood Bluffs is under attack. Loki is threatening to destroy our world - for good. Owen and his friends can't let that happen. But do they stand a chance of stopping him? less