I wasn't sure what to expect with this one, but I found myself really enjoying it.
Emily is a victim in a nuclear attack on Washington, and is offered a chance of survival, on condition she signs up to an experimental military program. She and a group of other young people, who have no real memory of their past lives, are transported to a facility, where every night they are trained via simulator to attack various objectives. If they die, they are held suspended for the remainder of the session, and wake up covered in bruises and feeling the pain from their wounds. One of the group, Matt, seems to know more than he is telling, and Emily forces him to tell her the truth - or at least some of it.
The story is well paced, and draws you in until you aren't sure what is supposed to be real, and what is supposed to be the simulation.