Will there be a sea of trolls book 4?

There is no official confirmation of a Sea of Trolls book 4. The series, written by Nancy Farmer, currently has three books:

1. The Sea of Trolls (2004)

2. The Grey King (2006)

3. The Last Warrior (2008)

As of today (2023-10-26), there have been no announcements about a continuation of the series. However, it's always possible that Nancy Farmer might revisit the world of the Sea of Trolls in the future!

To stay updated on any potential news, you could:

* Check Nancy Farmer's website or social media pages.

* Follow news from her publisher, Houghton Mifflin Harcourt.

* Look for updates on book news websites and forums.