The English Assassin (Gabriel Allon Series Book 2)
The Confessor (Gabriel Allon Series Book 3)
A Death in Vienna (Gabriel Allon Series Book 4)
Prince of Fire (Gabriel Allon Series Book 5)
The Secret Servant (Gabriel Allon Series Book 7)
The Messenger (Gabriel Allon Series Book 6)
Moscow Rules (Gabriel Allon Series Book 8)
The Mark of the Assassin (Michael Osbourne Book 1)
The Marching Season (Michael Osbourne Book 2)
The Defector (Gabriel Allon Series Book 9)