This is a sequel to “The Hidden Storyteller“ and “The Berlin Girl“ and while not absolutlely necessary, I do think it would be better reading them in the correct sequence. I always enjoy this author and was not disappointed. Not only was it a great historical thriller (Nazi hunting), I learned something new (London's 1952 Great Smog). I really hope to see these wonderful characters again. Thank you to NetGalley for the digital ARC. 4.5/5 stars!