Never Forget You is yet another WWII story (I seem to be on a bit of a binge at the moment!), but this novel focuses on four women, school friends who end up following very different paths through the war -- from working in the French Resistance in Paris, to flying planes, to infiltrating fascist groups within England itself. One of the characters is a real person, Noor Inayat Khan, though Gavin fictionalises aspects of her life. Inspired by reading this novel, I went on to watch the movie A Call to Spy on Netflix, which also features Noor's experiences (warning: it's pretty sad).
Unlike The Castle on the Hill, Never Forget You doesn't pull its punches -- not all the friends make it safely through the war. With her links to India, Gavin was obviously drawn tothe figure of Noor, and describes this novel as a 'tribute' to her. I must admit I did struggle a little with Noor's encounters with the fairies, which sat rather oddly in an otherwise bitterly realist story, though it does chime with her parallel career as a children's writer. But overall Never Forget You is absorbing and moving, and it definitely sent me down a rabbit hole of spies and resistance fighters.