This is one of those dual time/POV books. The story switches between England in the 1970s and England/US/Belgium right before the U.S. gets involved in WWII. 
 It's about a young female spy for Britain and her daughter, who years later learns that her mother is not who she thought she was. 
 It kept my attention, but it's not my kind of book. If you like spy thrillers with a little bit of quarter-life crisis thrown into the mix, this book is for you. 
 And, by the way, you can SO tell the sex scenes were written by a man. 
 My favorite quote: 
 "I'm almost sure that everyone does this about the people they love - it's a grim corollary of truly loving someone: you find yourself compelled to imagine your world without them and have to contemplate its awfulness and dread for a second or two. A peer through the crack to the emptiness, the big silence beyond. We can't help it - I can't help it, anyway, and I tell myself guiltily that everybody must do it, that it's a very human reaction to the human condition. I hope I'm right."