The Mark of Athena
Rick Riordan
Heroes of Olympus (3)
The Lightning Thief
Percy Jackson and the Olympians (1)
Harrow the Ninth
Tamsyn Muir
The Locked Tomb (2)
The Lost Hero
Heroes of Olympus (1)
The Sea of Monsters
Percy Jackson and the Olympians (2)
The Titan's Curse
Percy Jackson and the Olympians (3)
The Chalice of the Gods
Percy Jackson and the Olympians (6)