The Hidden Oracle
Rick Riordan
The Trials of Apollo (1)
The Dark Prophecy
Rick Riordan & John Rocco
The Trials of Apollo (2)
The Burning Maze
The Trials of Apollo (3)
The Tyrant's Tomb
The Trials of Apollo (4)
The Tower of Nero
The Trials of Apollo (5)
The Sun and the Star
Rick Riordan & Mark Oshiro
The Nico di Angelo Adventures (1)