Is there a sixth Percy Jakson book?

There are actually five books in the original *Percy Jackson & The Olympians* series. They are:

1. The Lightning Thief

2. The Sea of Monsters

3. The Titan's Curse

4. The Battle of the Labyrinth

5. The Last Olympian

There are other books in the *Percy Jackson* universe, like the *Heroes of Olympus* series, *The Trials of Apollo* series, and various spin-offs and novellas. However, there is no sixth book in the original *Percy Jackson & The Olympians* series.