Fragments of Light by Michele Phoenix

An impossible decision in the chaos of D-Day. Ripples that cascade seventy-five years into the present. And two lives transformed by the tenuous resolve to reach out of the darkness toward fragments of light.

Cancer stole everything from Ceelie—her peace of mind, her self-image, perhaps even her twenty-three-year marriage to her college sweetheart, Nate. Without the support of Darlene, her quirky elderly friend, she may not have been able to endure so much loss.
So when Darlene’s prognosis turns dire, Ceelie can’t refuse her seemingly impossible request—to find a WWII paratrooper named Cal, the father who disappeared when Darlene was an infant, leaving a lifetime of desolation in his wake.

The search that begins in the farmlands of Missouri eventually leads Ceelie to a small town in Normandy, where she uncovers the harrowing tale of the hero who dropped off-target into occupied France.
Alternating between Cal’s D-Day rescue by two young French sisters and Ceelie’s present-day journey through trial and heartbreak, Fragments of Light poses a timeless question: When life becomes unbearable, will you press toward the light or let the darkness win?