When I selected this series to read/listen to, a couple less than positive reviews and the fact that all four books were available with free codes made me wonder if I had made a mistake in my choice. By the middle of this first volume, I am happy to report I am no longer concerned. From the first time the U.S. Army Rangers and the U.S. Navy Seals commandeered their role in the story, I was hooked. The characters, their actions and genuine reactions to situations grabbed my interest and haven’t let go. The story switches between several sub-plots; Denny the teacher in Salmon Falls Idaho, Chad the hunter having valuable blood in Glacier National Park, Brenda Alston doctor and former military Captain in Los Angeles, Captain Derek Alston with a squad of Rangers ordered to retrieve Chad, Master Chief Cooper with a platoon of Seals directed to secure the President from a hospital in Los Angeles, Vice President Harold Baron and his *cough* assistant Jane Reynolds. Quite a list to keep track of but the tale moves along smoothly. The main story has the United States being invaded by foreign troops, softening us up first with a weaponized virus. I enjoyed this first volume and look forward to the next. I was given this free review copy audiobook at my request and have voluntarily left this review.