Trouble with reading Charlotte Gray was that I expected it to be an extension of Birdsong, Faulk's exceptional First World War novel. It's not, clearly -- it's about the Second World War and there's almost no battlefield action (while large portions of Birdson are literally in the trenches). It's about a love affair between a young Scottish woman and an RAF pilot who goes missing in France. The young woman resolves to find him. And it's hard to put down. But didn't destroy me like Birdsong did.
Note to self: what's a "sprung floor?" Faulks uses the phrase at least a half-dozen times. ANSWER: a floor with some shock absorption, used primarily for dance floors or sporting facilities.
Just looked up the 2001 movie which got mostly negative reviews: they significantly changed the end of the book, which is annoying.