Ten-year-old Zeus, irritated that he keeps getting struck by lightning, discovers a magical thunderbolt embedded in a stone and embarks on the adventure of a lifetime when he is attacked by the Titans, who have been kidnapping other Olympian children with powers comparable to Zeus's.

The Olympians search for the spear of fear, a weapon that belongs to Ares but is currently held by the Amazonians.

When Zeus, Hades, and Poseidon continue on a new quest in the search for the Helm of Darkness, they discover many things in the Underworld that Hades does not fear except a giant three-headed dog.

"The Olympians are off in search of hairy snakes -- whatever that means. Aphrodite's newfound magical object, a golden apple that makes gold coins on command, helps the Olympians buy food for their journey. The shiny gold coins attract the attention of a mortal boy, Perseus, who tells the Olympians the mysterious Gray Triplets hold the secret to finding those hairy snakes -- and he is happy to take the Olympians to meet them. But when they arrive,...

Resolving to stop the Norse trickster Loki from invading Pinewood Bluffs with his army of monsters, Owen, Dana, Jon and Sydney stow away on Loki's sledge and find themselves in an underworld, where they face complicated challenges.

Owen, Dana, Jon, and Sydney must find a crystal rune before Norse trickster Loki uses its power to destroy their world.

"A clash between the Titans and The Olympians at sea leaves Zeus and his friends shipwrecked--and in a tidal wave of trouble--in this Heroes in Training adventure" -- "After an encounter with Uranus, God of the Sky (and father of the Titans), the Olympians find themselves in the middle of a battle between two big-time Titans. On Cronus's orders, Titan Oceanus dives into the sea and causes it to turn even stormier. He's heading straight for the Olympians'...

Having proven himself capable of caring for the mythical creatures that dwell on Olympus, eleven-year-old Demon is summoned by the great god Hades to the Underworld to tend to Cerberus, the three-headed dog Guardian of the Underworld, which has been beaten by Demon's nemesis, Heracles.

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...

"Fresh off their adventure with Crius's Cronies, the Olympians set out for the island of Lemnos, and there's a reason they receive warnings as they travel: Warriors holding intricate weapons greet them as soon as they come ashore! Then they meet Hephaestus, the leader of the island who they quickly realize is actually one of them--the Olympian they were meant to find. But Hephaestus isn't so sure he wants to leave with the Olympians. After all, life...