This is a really engaging novel, partially based on real events. There's a really cool note at the beginning of the book, which explains the tapestry of files, correspondence, family folklore and fiction that makes Edith and Kim up. I've never read a spy novel about a female spy who has to maintain a domestic life, having a child, etc. while maintaining her spy work. The audiobook is really enjoyable and compels you through the story. Coming to this book from Le Carré's Smiley novels that interact with Kim Philby's real-life, I'd expected more of Kim from the blurb and marketing. That said, the most enjoyable thing about the book for me is how the story is punctuated with Philby’s letters to Edith from exile, unmasking their connection decades on.