How many books are in the abby Hayes series?

There are 7 books in the Abby Hayes series by David Baldacci.

They are:

1. The Simple Truth (2004)

2. The Whole Truth (2005)

3. The Last Appeal (2006)

4. Divine Justice (2007)

5. Deliver Us From Evil (2008)

6. The Fallen (2010)

7. The Innocent (2019)