At the Edge of Summer by Jessica Brockmole. The book is being released by Knopf on May 17, 2016.
Amazon says this about the book: Luc Crépet is accustomed to his mother’s bringing wounded creatures to their idyllic château in the French countryside, where healing comes naturally amid the lush wildflowers and crumbling stone walls. Yet his maman’s newest project is the most surprising: a fifteen-year-old Scottish girl grieving over her parents’ fate. A curious child with an artistic soul, Claire Ross finds solace in her connection to Luc, and she in turn inspires him in ways he never thought possible. Then, just as suddenly as Claire arrives, she is gone, whisked away by her grandfather to the farthest reaches of the globe. Devastated by her departure, Luc begins to write letters to Claire—and, even as she moves from Portugal to Africa and beyond, the memory of the summer they shared keeps her grounded.
Years later, in the wake of World War I, Clare, now an artist, returns to France to help create facial prostheses for wounded soldiers. One of the wary veterans who comes to the studio seems familiar, and as his mask takes shape beneath her fingers, she recognizes Luc. But is this soldier, made bitter by battle and betrayal, still the same boy who once wrote her wistful letters from Paris? After war and so many years apart, can Clare and Luc recapture how they felt at the edge of that long-ago summer?
Bringing to life two unforgettable characters and the rich historical period they inhabit, Jessica Brockmole shows how love and forgiveness can redeem us.