After losing her beloved sister three years ago, Savannah Litchfield has been living half a life. Now seventeen—the age Poppy died—the pain of losing her is worse than ever. When Savannah’s therapist suggests a trip around the world to help teens stricken by loss, she reluctantly agrees to it, clutching the unread journal Poppy left her as she goes.

Autumn and Finn used to be inseparable. But then something changed. Or they changed. Now, they do their best to ignore each other. Autumn has her boyfriend, Jamie, and her close-knit group of friends. And Finn has become that boy at school, the one everyone wants to be around. That still doesn't stop the way Autumn feels every time she and Finn cross paths, and the growing, nagging thought that maybe things could have been different. Maybe they should be together. But come August, things will change forever.

Briggs: Remember when we parted ways in Germany? It was the day I broke your heart. What you didn't know was that I was breaking mine too. I thought they'd be enough - my husband and my son. That I'd get home and everything would go back to the way it was...before the war. Before the ambush. Before you. But, no matter how hard I try, I can't erase the trauma we shared. I can't seem to forget the way my heart beat in time with yours. I thought the nightmare was over when they pulled us from that hole in the ground, but nothing could have prepared me for the war I'd face at home.

Beckett: If you’re reading this, well, you know the last-letter drill. You made it. I didn’t. Get off the guilt train, because I know if there was any chance you could have saved me, you would have. I need one thing from you: get out of the army and get to Telluride. My little sister Ella’s raising the twins alone. She’s too independent and won’t accept help easily, but she has lost our grandmother, our parents, and now me. It’s too much for anyone to endure. And here’s the kicker: there’s something else you don’t know that’s tearing her family apart.

Tristan Stiles is the bane of my existence. He never wears a shirt. We can’t seem to stop fighting. He’s an arrogant playboy with a filthy reputation. Sure, I had a crush on him when I was fourteen but that was a long time ago. I know better than to trust him. I just need to survive long enough to find a new job and get a new place. And not accidentally let Tristan show me exactly how well-deserved his reputation is.