The Alice Network

The Alice Network is a 2017 historical fiction novel by American author Kate Quinn. It was a "New York Times" and "USA Today" bestseller.
Plot.
The plot follows pregnant American college student Charlie St. Clair in the aftermath of World War II, as she travels around France looking for her missing cousin, Rose. Her story intersects with that of World War I spy, Eve Gardiner, who joins the fight against the Germans in 1915, with the help of Louise de Bettignies.
Background.
The novel is inspired by the story of the Alice Network, a covert group of women spies who worked during World War I in the area of Lille, France gaining German information and sending it to England 
Reception.
"The Alice Network" was a "New York Times" and "USA Today" bestseller. It was named one of NPR's Best Books of the Year.