This box set includes the first four thrillers in the award-winning Duncan Hunter Thrillers. Book #5, Wet Work, is now available. Book #6, Special Activities, releases April 29, 2021. Duncan Hunter, a retired Marine Corps flies a top-secret airplane with his mentor, Greg Lynche, the sometimes uber-liberal retired CIA Chief of Air Branch. Together, in their quiet airplane, they execute some of the CIA's most sensitive airborne counterterrorism missions under a Special Access Program.