This is *The Paris Daughter by Kristin Harmel* - New York Times bestseller.
Published *June 6, 2023* - from the author of _The Book of Lost Names_.
Here is a summary in English:
*Paris, 1939. Two young American women in Paris become best friends.*
*Elise LeClair* - an American sculptor, married to French artist Olivier LeClair. She is pregnant with their first child.
*Juliette Foulon* - an American bookseller, married to Paul Foulon. She is pregnant with her third child. They own a small, dreamy bookshop in Paris called *Librairie des Rêves* (Bookshop of Dreams).
The war creeps closer. Elise and Juliette spend their days together in the Bois de Boulogne park with their babies.
*1941 - The Separation:*
The Germans occupy Paris. Olivier works with the Resistance, distributing anti-Nazi art and leaflets. Elise begs him to stop - it's too dangerous.
He is arrested by the Gestapo and beaten to death.
Elise's art dealer warns her: the Germans are now looking for her too because of Olivier. She must flee Paris immediately.