Amazon.com description: Product Description: VOLATILE RELATIONS 

A new era of friendship between the Syrian and U.S. governments is threatened when American high-tech weapons go missing en route overseas. Determined to destroy the stolen arms before they can be used, Mack Bolan discovers nothing is what it seems between the Syrian regime and the loyalists—including the beautiful double agent working with him. 

Getting to the weapons alive is only one of Bolan's problems. Tracking down the enemy behind the theft—without starting a war—will put his years of experience to the test. But discretion is of the utmost importance, and the lives of millions are at stake, which makes the Executioner the only man for this mission.