During World War II, the constant threat of German bombs falling on London and other key cities forced many English families to make an incredibly painful choice: whether to keep their children with them in this dangerous area or to separate from them, sending them away to places where they could hopefully live more safely and normally. Known as Operation Pied Piper, the evacuation of people from the cities, mostly children, started in September of 1939 and is estimated to have involved the relocation of almost 3.75 million residents. Many of the most famous portrayals of evacuees being relocated remain within England. In Crooked Heart, for example, Noel Bostock is sent to a suburb of London for his safety. Similarly, in perhaps the most famous literary example, the Penvensie siblings of The Chronicles of Narnia go to a professor's countryside home. In Laura Spence-Ash's debut novel, Beyond That, the Sea, however, Beatrix Thompson travels for two weeks by steamship to Massachusetts...