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The Lost Hero (Heroes of Olympus, #1) by Rick Riordan

Percy Jackson and the Last Olympian (Book 5) (Percy Jackson & the Olympians, #5) by Rick Riordan

Percy Jackson and the Battle of the Labyrinth (Book 4) (Percy Jackson & the Olympians, #4) by Rick Riordan

Percy Jackson and the Olympians, Book Two: Sea of Monsters, The-Percy Jackson and the Olympians, Book Two (Percy Jackson & the Olympians, #2) by Rick Riordan

Percy Jackson and the Titan's Curse (Book 3) (Percy Jackson & the Olympians, #3) by Rick Riordan

Percy Jackson and the Olympians, Book One: Lightning Thief, The-Percy Jackson and the Olympians, Book One (Percy Jackson & the Olympians, #1) by Rick Riordan