The Spy Keeper of Marseille by Roseanna M. White

In 1941 in the unoccupied zone of France, war widow Zelie Bellarose uses her intelligence and daring in the growing Alliance spy network. When the leader is captured, Zelie takes the helm. All seems fun and exciting until betrayal rips through the network, and Zelie is forced to restructure not just the network but her whole way of thinking about life.
Virtuoso pianist Marcel Laurent is recruited into Alliance. His position as conductor for Vichy’s youth orchestra allows him to travel freely around all France, to mingle with those in power – and to send coded messages in his radio performances. He can’t help but fall for Zelie, but Zelie keeps him at a distance, wounded by her past and apprehensive about her future.
Exciting and romantic! With a strong baseline of little-known history, a sweet melody for Marcel and Zelie’s building love, the rich harmony of Zelie’s personal growth, and jarring notes of danger and betrayal, The Spy Keeper of Marseille thrills. Roseanna M. White has written another stellar World War II novel.