The Wall - N J Croft

Set in an uncomfortably familiar future...
We built a wall to keep the dangers of the world out...but was it actually meant to keep us in?
Your every word is monitored. Your every movement watched.
If you have nothing to hide, you have nothing to fear.
And if you stay within the wall, the Loyalist Party will protect you.
Gideon Frome knows that safety is an illusion. Ten years ago, his perfect life was shattered, and he left Washington DC in disgrace, sentenced to serve on The Wall. He may be back, lauded as a hero, but he knows he's only traded one prison for another, assigned a position to the infamous Secret Service.
Kate Buchanan uses her illegal predictive engine to monitor the "chatter," flagging perceived threats to America. When the program suggests that nuclear war is imminent, and people around her start to die, Kate can no longer hide. She needs help, and it comes from the most unlikely place-Gideon Frome, a ghost from her...

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