I’m extremely grateful to Alexandre Quintanilha, Isabel Silva, Judith Ravenscroft, Anna Jarota and Rabbi Jacob Staub for reading the manuscript of this book and giving me their invaluable comments. I also want to thank everyone at Parthian Books, especially its perceptive and hard-working founder Richard Davies and my extraordinarily gifted editor, Robert Harries. Lastly, I owe a great debt to the many Holocaust survivors who have written and spoken about their experiences, especially those who – like the main characters in my novel – grew up in Poland.