Is Suzanne Collins writing a 6th book to Gregor the overlander?

As of my last update, Suzanne Collins has not announced any plans for a 6th book in the Gregor the Overlander series.

The series currently consists of five books:

* Gregor the Overlander

* Gregor and the Prophecy of Bane

* Gregor and the Curse of the Warmbloods

* Gregor and the Marks of Secret

* Gregor and the Code of Claw

While fans may hope for more adventures in the Underland, there's no official word on a sixth book.

It's always possible that Collins might decide to revisit the world of Gregor in the future, but for now, the series stands at five books.