For young adults:
* The Underland Chronicles: This series, comprised of five books, follows the adventures of Gregor, a young boy who falls into a secret world beneath New York City, populated by giant cockroaches, spiders, and other creatures.
* Gregor and the Prophecy of Bane (2003)
* Gregor and the Curse of the Warmblood (2005)
* Gregor and the Marks of Secret (2007)
* Gregor and the Code of Claw (2008)
* Gregor and the Code of Claw (2009)
For adults:
* The Ballad of Songbirds and Snakes (2020): A prequel to The Hunger Games, set 64 years before the events of the original trilogy. It tells the story of Coriolanus Snow, the future president of Panem, as he mentors a tribute for the tenth Hunger Games.
Other:
* When Charlie McButton Lost His Button (2000) - Picture book for children.
Suzanne Collins has also contributed to other writing projects, including the screenplay for "The Hunger Games" movie series.