Heroes of Olympus: The Son of Neptune (Heroes of Olympus, 2)+The Mark of Athena (Heroes of Olympus Book 3) (Heroes of Olympus, 3)
The Mark of Athena (Heroes of Olympus Book 3) (Heroes of Olympus, 3) & Kane Chronicles : The Red Pyramid
The Mark of Athena (Heroes of Olympus Book 3) (Heroes of Olympus, 3) & Demigods and Magicians: Three Stories from the World of Percy Jackson and the Kane Chronicles Rick Riordan
The House of Hades (Heroes of Olympus Book 4) (Heroes of Olympus, 4)+The Mark of Athena (Heroes of Olympus Book 3) (Heroes of Olympus, 3)
