Series
Underland chronicles
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.
4 books here
Publication order
This is publication order — nobody has confirmed a different reading order for this one yet.
4
Gregor and the Marks of Secret
· Suzanne Collins
5
Gregor And The Code Of Claw
· Suzanne Collins
—
Gregor and the Curse of the Warmbloods
· Suzanne Collins
—
Gregor the Overlander
· Suzanne Collins