Enemy of the State, Volume 16, Flynn Vince, Mills Kyle

After 9/11, the United States made one of the most secretive and dangerous deals in its history--the evidence against the powerful Saudis who coordinated the attack would be buried and in return, King Faisal would promise to keep the oil flowing and deal with the conspirators in his midst.

But when the kings own nephew is discovered funding ISIS, the furious President gives Rapp his next mission: he must find out more about the high-level Saudis involved in the scheme and kill them. The catch? Rapp will get no support from the United States.

Forced to make a decision that will change his life forever, Rapp quits the CIA and assembles a group of independent contractors to help him complete the mission. Theyve barely begun unraveling the connections between the Saudi government and ISIS when the brilliant new head of the intelligence directorate discovers their efforts. With Rapp getting too close, he threatens to go public with the details of the post-9/11 agreement between the two countries. Facing an international incident that could end his political career, the President orders Americas intelligence agencies to join the Saudis effort to hunt the former CIA man down.