The Long Way Home. Need To Know, #3

Downrange, she was the interrogator who could read anyone. He was the officer who ran her detachment. The regulations made them impossible - so they never crossed the line. A year after they both leave the Corps, they collide in a small Ohio town, at the memorial for the friend they couldn't save. The rank is gone. The war is over. There's nothing left in the way of them at all - and that turns out to be the most frightening thing of all, because the regulation was only ever the wall they were hiding behind. Cass Mercer spent a career becoming whoever a stranger needed her to be in order to break - and she's worn so many faces she's lost the real one.
Adam Stahl carried an entire detachment and let no one carry him, and he came home a wall. They are the only two people who can read each other, and the only two cleared into the same unbearable secret: how their friend really died, and whose call it was. Over one summer, building a reading room in a dead boy's name, two people who are experts at everyone else's truth have to risk the one thing neither has ever survived - being known, all the way down - before the longest way home runs out of road. The Long Way Home is an emotionally charged, dual-timeline military romance about classified silence, survivor's guilt, and the slow brave work of letting yourself be seen.
Book 3 in the Need to Know series - a complete standalone with a hard-won happy ending.