Percy Jackson Series in Order: Percy Jackson and the Olympians: The Lightning Thief Percy Jackson and the Olympians: The Sea of Monsters Percy Jackson and the Olympians: The Titan’s Curse Percy Jackson and the Olympians: The Battle of the Labyrinth Percy Jackson and the Olympians: The Last Olympian The Heroes of Olympus: The Lost Hero The Heroes of Olympus: The Son of Neptune The Heroes of Olympus: The Mark of Athena The Heroes of Olympus: The House of Hades The Heroes of Olympus: The Blood of Olympus The Trials of Apollo Series