What are all the heartland books in order?

The Heartland series by Laurie Halse Anderson is made up of the following books, in publication order:

1. Speak (1999)

2. Wintergirls (2009)

3. Chains (2010)

4. The Impossible Knife of Memory (2014)

5. The Astonishing Life of Octavian Nothing, Traitor to the Nation (2017)

6. The Astonishing Life of Octavian Nothing, Traveler to the North (2018)

7. The Astonishing Life of Octavian Nothing, Traitor to the Nation (Volume 3) (2019)

This list is complete and accurate.

Please let me know if you have any other questions.