What are all the books, in order, in the Percy Jackson series?

The Percy Jackson & the Olympians series by Rick Riordan consists of five books, in order. These are:

1. The Lightning Thief (2005)
   • Percy Jackson discovers he is a demigod and goes on a quest to prevent a war between the Olympian gods.
2. The Sea of Monsters (2006)
   • Percy and his friends journey to the Sea of Monsters to retrieve the Golden Fleece and save Camp Half-Blood.
3. The Titan’s Curse (2007)
   • Percy and his friends set out to rescue Artemis, the goddess of the hunt, and a kidnapped friend while facing a powerful foe.
4. The Battle of the Labyrinth (2008)
   • Percy navigates the dangerous Labyrinth to stop Kronos’ forces from invading Camp Half-Blood.
5. The Last Olympian (2009)
   • Percy leads the demigods in a final battle to protect Mount Olympus and stop Kronos’ rise to power.

These books follow Percy Jackson, a modern-day demigod, as he navigates the challenges of growing up, battling monsters, and fulfilling his destiny in the world of Greek mythology.