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