The Circle series

Thomas Hunter is a failed writer selling coffee at the Java Hut in Denver. Leaving work, he suddenly finds himself pursued by assailants through deserted alleyways. Then a silent bullet clips his head...and his world goes black. From the blackness comes an amazing reality of another world where everything is somehow more real--and dangerous--than on Earth. In one world, he's a battle-scarred general commanding an army of primitive warriors. In the other, he's racing to outwit sadistic terrorists intent on creating global chaos through an unstoppable virus. Every time he falls asleep in one world, he awakens in the other. Yet in both, catastrophic disaster awaits him...may even be caused by him. Enter the Circle--an adrenaline-laced epic where dreams and reality collide. Where two worlds are on the brink of destruction with one unthinkable solution.