"An enchanting, ghostly story that had me in its grip until the last page."--Jennifer A. Nielsen, New York Times and USA Today best-selling author of The False Prince "Keep calm and carry on." That's what Katherine Bateson's father told her, and that's what she's trying to do: when her father goes off to the war, when her mother sends Kat and her brother and sister away from London to escape the incessant bombing,...