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Rick riordan has written the 39 clues series,percy jackson and the olyimpians the lightning theif,the sea of monsters,the titans curse,the battle of the laybribth,the last olyimpian,rebel island,and the kane chronicles: The red pyramids thats all I know which is like 13 books I think.
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The 39 clues : The maze of bonesHe has written The Percy Jackson and the Olympians series, that is now a major motion picture.Rick
Riordan has wrote a lot of good books. The only books I know of are The
Lightning Thief, The Sea of Monsters, The Titan's Curse, The Battle of
Labyrinth, and The Last Olympian. That's all there is in the Percy
Jackson & The Olympians series. Rick Riordan also wrote The 39
Clues series. That's all I know of. I hope this answer was good enough.
Riordan has wrote a lot of good books. The only books I know of are The
Lightning Thief, The Sea of Monsters, The Titan's Curse, The Battle of
Labyrinth, and The Last Olympian. That's all there is in the Percy
Jackson & The Olympians series. Rick Riordan also wrote The 39
Clues series. That's all I know of. I hope this answer was good enough.