Ackerman is a former Marine Corps special operations team leader whose books include Halcyon, Green on Blue and Waiting for Eden. He also co-wrote 2034 and sequel 2054 with Admiral James Stavridis.
Sheepdogs revolves around Skwerl and Cheese, two elite paramilitary soldiers down on their luck. Skwerl is an ex-Marine who used to work for the CIA’s elite paramilitary wing but was fired after a raid went bad in Afghanistan. Big Cheese Aziz is a legendary pilot, but the fall of Kabul has left him working the nightshift at a gas station. Skwerl recruits Cheese into an anonymous network of so-called sheepdogs,…