The Revenger by David Nees

He's deadly, elusive, and aimed against the West
A new enemy emerges that Dan Stone has to confront.
The bombings occur almost simultaneously. They cause much death and destruction. International agreements are threatened, and Dan and his team must find those responsible and bring them to rough justice. However, a new terrorist leader senses that Dan has an advantage and seeks to neutralize it. Dan’s pursuit leads him to engage the help of an unlikely ally and takes him across some of the most dangerous parts of the Middle East in pursuit of the Revenger.