Trapeze by Simon Mawer

Marian Sutro, a young Englishwoman with a French father, is recruited during World War II by the British Special Operations Executive. Trained in espionage, sabotage, and survival, she’s sent into occupied France under a false identity. Her mission is perilous — to contact a scientist whose work could change the course of the war — but it’s also personal, tied to a past she thought she left behind. As danger closes in, Marian must navigate a web of deception, divided loyalties, and impossible choices in a story of courage, passion, and sacrifice behind enemy lines.