There are 2 series with the name: The Culper Ring
The Culper Ring Books in Order
Books by Brad Meltzer1. The Inner Circle (2011)
2. The Fifth Assassin (2013)
3. The President's Shadow (2015)
The Culper Ring Books in Order
Books by Roseanna M. White1. Ring of Secrets (2021)
2. Whispers from the Shadows (2013)
3. Circle of Spies (2021)