Ghost Hope (The PSS Chronicles book 4‪)‬

Olivia Black does not feel safe. Nightmares plague her sleep and haunt her days. If she has to endure one more minute stuck in a safe house in rainy Portland, she's going to lose it. When Mike Palmer sneaks off to find her sister without her, it's the last straw. She has to do something.

Then Palmer's hackers find the Dome on a satellite feed: dark, abandoned and smack in the middle of the Oregon desert three hundred miles from where it started. If they can reach it before anyone else, they can crack the computer systems and access every piece of information on PSS the CAMFers and The Hold have ever collected.

But in order to do that, Olivia must return to the origin of her fears in a race against all the forces that have ever pitted themselves against her. She must unravel decades of deceit to reveal the true origins of Psyche Sans Soma to the world at last.