How many books are there in the brixton brothers series?

There are 12 books in the Brixton Brothers series by James Patterson and David Baldacci.

Here are the titles in order:

1. The Angel of Death

2. The Prisoner of War

3. The Enemy

4. The Code

5. The Bullet

6. The Recruit

7. The Assassin

8. The Fugitive

9. The Renegade

10. The Executioner

11. The Exile

12. The Avenger