The Ancient One

The Seven Songs: Book 2

Percy Jackson and the Lightning Thief (Book 1)

Atlantis Rising

Percy Jackson and the Sea of Monsters (Book 2)

The Lost Years: Book 1

Percy Jackson and the Last Olympian (Book 5)

Atlantis in Peril

Percy Jackson and the Titan's Curse (Book 3)

The Raging Fires: Book 3

The Ruins of Gorlan (Ranger's Apprentice Book 1 )

The Mirror of Fate: Book 4

The Blood of Olympus (Heroes of Olympus Book 5)

The Dragon of Avalon: Book 6

The Tower of Nero (The Trials of Apollo Book 5)

The Wizard's Wings: Book 5

Percy Jackson and the Battle of the Labyrinth (Book 4)

Doomraga's Revenge: Book 7

The House of Hades (Heroes of Olympus Book 4)

The Great Tree of Avalon: Book 9