Series
Percy Jackson e gli Dei dell'Olimpo
We don't know whether this one is finished.
Nobody has confirmed the status of this series yet. That's a gap in our data, not a verdict on the books.
2 books here
Publication order
This is publication order — nobody has confirmed a different reading order for this one yet.
5
The Last Olympian
· Rick Riordan
—
Percy Jackson and the Lightning Thief - The Graphic Novel
· Robert Venditti