The Dark Prophecy
Rick Riordan
The Trials of Apollo (2)
The Mark of Athena
The Heroes of Olympus (4)
The Tower of Nero
The Trials of Apollo (5)
The Lost Hero
The Heroes of Olympus (1)
Unraveled
Shannon Messenger
Keeper of the Lost Cities (9.5)
Stellarlune
Keeper of the Lost Cities (9)
Exile
Keeper of the Lost Cities (2)
Keeper of the Lost Cities
Keeper of the Lost Cities (1)
Everblaze
Keeper of the Lost Cities (3)
Neverseen
Keeper of the Lost Cities (4)
Lodestar
Keeper of the Lost Cities (5)
Nightfall
Keeper of the Lost Cities (6)
Legacy
Keeper of the Lost Cities (8)
Flashback
Keeper of the Lost Cities (7)
Unlocked
Keeper of the Lost Cities (8.5)