19 1 50 The Lost Hero Rick Riordan Primary Author mixed material 9780141325491 London Puffin 2020 cover_heroes_of_olympus_the_lost_hero.jpg Rick Riordan Primary Author mixed material 9781423153962 Rick Riordan Primary Author mixed material 9780141319148 Puffin 2008 cover_percy_jackson_and_the_sea_of_monsters.jpg Rick Riordan Primary Author mixed material 9781423101499 Rick Riordan Primary Author mixed material 9780141321264 images_%284%29.jpg.jpg Rick Riordan Primary Author mixed material 9780141319131 Puffin cover_percy_jackson_and_the_lightning_thief_puffin_2008_.jpg Rick Riordan Primary Author mixed material 9780141321288 percy-jackson-last-olympian-rick-riordan-9780141321288.jpg.jpg Rick Riordan Primary Author mixed material 9781423185406 cover_the_house_of_hades.jpg Rick Riordan Primary Author mixed material 9780141342559 cover_magnus_chase_and_the_hammer_of_thor.jpg Rick Riordan Primary Author mixed material 9780141342597 cover_magnus_chase_and_the_ship_of_the_dead_3.jpg The Blood Of Olympus Rick Riordan Primary Author mixed material 9780141339252 The Sea Of Monsters Rick Riordan Primary Author mixed material 9781423103349 Rick Riordan Primary Author mixed material 9781423167099 Rick Riordan Primary Author mixed material 9781423150596 Rick Riordan Primary Author mixed material 9781423151425 Rick Riordan Primary Author mixed material 9780141321271 Puffin 2009 cover_percy_jackson_and_the_battle_of_the_labyrinth.jpg The Son of Neptune Rick Riordan Primary Author mixed material 9780141335735 Puffin 2020 cover_heroes_of_olympus_the_son_of_neptune.jpg The Maze Of Bones Rick Riordan Primary Author mixed material 9780545060394 cover_the_39_clues_the_maze_of_bones.jpg Rick Riordan Primary Author mixed material 9780141335391