The #1 bestselling master of suspense and international intrigue continues to set the standard against which all other thrillers are measured with his expertly plotted, pulse-pounding Covert-One series. An unknown doomsday virus has claimed the lives of four people across the country—including Dr. Sophia Russell, a research scientist working to understand the disease. Bitter and broken-hearted over her death, Lt. Colonel Jon Smith is determined to uncover the cause of the virus that killed her—and prevent it from turning into a pandemic of epic proportions. When new evidence reveals that Sophia’s death was no accident, Smith assembles a private team to aid his fight against the deadly virus—and find the determined genius who’s responsible. Smith’s quest will lead him to the highest levels of power and the darkest corners of the earth…and bring him face to face with an unknown enemy who will stop at nothing to achieve his means. Meanwhile, the fate of the world hangs in the balance . . .