Downtiming the Night Side

Former Air Force officer and NSA agent Ron Moosic thought he had been assigned to be the Security Director for a nuclear power plant - but the power plant was only a cover for a top secret project sending observers back in time. And terrorists had taken control of the project and sent two of their own back to change the past. Moosic was sent downtime in pursuit, with two considerable handicaps: like all time travelers, he would change upon arrival into a person who was alive at the time - he could find himself changed into a young boy or a woman - and if he stayed too long, his memories would vanish and he would be trapped in the past.
But Moosic quickly discovered that both he and the terrorists were only pawns in the time game, maneuvered by warring humans and... ex-humans in a future struggle that would either conquer the Earth or destroy all life on it...