It's being compared to Kristin Hannah's The Nightingale.
Liv Kent is living in New York and has unexpectedly hit rock bottom just before her grandmother shows up unannounced insisting on a trip to France. Liv is reluctant, but her grandmother insists. As the novel unfolds, Liv understands her grandmother's ulterior motive is to tell her a tragic decades-old story that takes them to the caves of Maison Chaveau.
Ines is newly married to Michel, a winemaker in Champagne as World War II looms closer and closer to champagne. Michel turns his back on his new marriage to begin hiding munitions for the Resistance during the German occupation of France. Meanwhile, Ines tries to help protect Celine, the half-Jewish wife of one of the vineyard's chefs, and her friend.
Celine makes a reckless decision in an effort to be free while Ines has made an awful mistake with a Nazi collaborator. Between them, Celine and Ines have risked the lives of everyone they love and Maison Chaveau.
This might be one that hits the big lists. It's "perfect for fans of Kristin Hannah's The Nightingale."