Greystone Secrets Books in Order
1. Greystone Secrets #1: The Strangers (2019)
2. Greystone Secrets #2: The Deceivers (2020)
3. Greystone Secrets #3: The Messengers (2021)
The 39 Clues Books in Order
10. The 39 Clues #10: Into the Gauntlet (2010)
Standalone Books in Order
Running Out of Time (1997)
See more: Margaret Peterson Haddix Books