The feeling of urgency at work and at the same time the anxiety and restrictions that the war forced on ordinary people is brilliantly portrayed. Sylvia's Secret is more focused than Daisy's War, in that Sylvia leads an almost claustrophobic existence because of her top-secret work. In a sense, Sylvia is protected from the wider context of the war that affects Daisy. So, interestingly, there are no casualties or deaths in the second novel. I cannot recommend this book highly enough.