Replica X is Book 2 in the X Files Series

Whitney is on the run from a company that has been operating in the shadows for decades, building technology that the world isn't ready for and feeding it into the public without them knowing. The brutal information scaring Whitney is that there are clones among us and there's no way of know who is a clone and who is real.
Even more terrifying, the company responsible for the cloning had a secret that has something to do with Whitney.

After surviving the destruction of the facility where she learned all of the dark secrets, Whitney and her old friend, Davy, escape to a nearby friend who might just have enough resources and skills to keep them safe one more day. There, they do their best to rally the cyber community to battle against the cloning. At the same time, they mistakenly send out a flare to their enemy, letting them know where they are.

Not willing to be stuck on the defensive, Whitney and her two friends go on the offensive. Going after their eyes and ears, they decide that their only lead is a mysterious man who has been lurking in the Deep Web, hunting down those who come across the company's insidious plans.

As the game of cat and mouse begins with another hacker, they have to avoid the age of the Code D who are out to stop them.

Are the hunters the ones who are being hunted now and how far down the rabbit hole are Whitney and her friends willing to go?