When I first read this book in the early '70s, I was intrigued by the story and the possibility that Anna Anderson might indeed be the Grand Duchess Anastasia. The passage of time and DNA evidence has proved this to be false. Anna Anderson was a Polish servant, as many had already stated. For those who still hold onto the myth of the survival of any of the Romanovs, do they really believe that Stalin, who ordered the murder of so many of his old Bolshevik "comrades", would have had any scruples in ordering the death of any surviving Romanovs, no matter where in the world they were.
Al that being said, this book is quite an enjoyable read as historical fiction along the same lines as, say, Len Deighton or Ellis Peters. But please don't think that this has anything to do with reality except, of course, the massacre of the Tsar, all his family and their servants at Ekaterinburg.