Meredith recommends The Warm Hands of Ghosts by Katherine Arden

A nurse still reeling from personal tragedy returns to the trenches of WWI to find her missing younger brother in this magical-realist historical fiction. The life-affirming story echoes ancient myth to explore what war and trauma take from us all--and how hard we have to fight to reclaim it.
Publisher's description:
During the Great War, a combat nurse searches for her brother, believed dead in the trenches despite eerie signs that suggest otherwise, in this hauntingly beautiful historical novel with a speculative twist, from the author of The Bear and the Nightingale.