In this layered and poignant story, a girl who keeps her heart protected meets a boy with his head in the stars. The award-winning author of A Heart in a Body in the World beautifully captures the kind of love—and loss—that changes you forever.
When Margaret sees Mars for the first time, it doesn't feel like love at first sight so much as future at first sight—she just knows right away that he will loom large in her life.
When her job delivering pizzas brings Margaret right to Mars's doorstep, soon they're giving in to fate and spending every free moment together. Their romance deepens over stargazing and moments under the night sky, where Mars shares his passionate interest in the Voyager record in space, captivating her with the power of what can last over time. 
Even as she continues to fall harder and faster for him, Margaret struggles against the voice of anxiety in her head warning her that danger is always waiting around corners. But even for someone who anticipates the worst, when it actually happens, Margaret is devastated. In the wake of a tragedy, somehow she has to find a way forward. Despite her grief, she has to continue to look up to the stars and let the whole of universe in—all the beauty and all the pain.