119 books • 14 series
The House of Hades: The Graphic Novel (Heroes of Olympus Book 4) (Heroes of Olympus: The Graphic Novels)
Percy Jackson and the Olympians: Wrath of the Triple Goddess (Percy Jackson & the Olympians, #7)
The Mark of Athena: The Graphic Novel (Heroes of Olympus Book 3) (Heroes of Olympus: The Graphic Novels)
Percy Jackson and the Olympians: The Chalice of the Gods (Percy Jackson & the Olympians, #6)
The Heroes of Olympus, Book Three: The Mark of Athena: The Graphic Novel (Heroes of Olympus)
The Last Olympian: The Graphic Novel (Percy Jackson & the Olympians Graphic Novels, #5)
Heroes of Olympus: The Complete Series (Books 1, 2, 3, 4, 5) (Heroes of Olympus, Books 1-5)