All Things Visible and Invisible by P.C. Donan

Lieutenant Nick Bayan meets Julie Earharth at a party and instantly falls in love with her. A few months later they marry and she gets pregnant. He deploys to Afghanistan where things did not go so well during his first mission. He goes home for the birth of his child and his nightmare begins to surface. When he returns to Afghanistan to finish his deployment, he begins to fall apart, consumed, and haunted by what he did. He comes home a broken man searching for salvation, redemption, and love.