Ghost Keeper (World of Ghost Exile short story)

Percy Jackson and the Lightning Thief (Book 1)

Ghost Nails (World of Ghost Exile short story)

Percy Jackson and the Sea of Monsters (Book 2)

Percy Jackson and the Last Olympian (Book 5)

Ghost in the Ring

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

Frostborn: Excalibur (Frostborn #13)

The Blood of Olympus (Heroes of Olympus Book 5)

Frostborn: The False King (Frostborn #11)

The House of Hades (Heroes of Olympus Book 4)

Frostborn: The Gorgon Spirit (Frostborn #7)

The Mark of Athena (Heroes of Olympus Book 3)

Frostborn: The Master Thief (Frostborn #4)

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

Frostborn: The Undying Wizard (Frostborn #3)

The Son of Neptune (Heroes of Olympus Book 2)

Frostborn: The Eightfold Knife (Frostborn #2)