The Hidden Oracle
Rick Riordan
The Trials of Apollo (1)
Norse Mythology
Neil Gaiman
The Sun and the Star
Rick Riordan & Mark Oshiro
The Aeneid
Vergil & Virgil
Trials of Apollo 4: The Tyrant's Tomb
The Trials of Apollo (4)
Trials of Apollo 4.5: Camp Jupiter Classified
Trials of Apollo (4.5)