How does Greene foreshadow Sarah’s illness in the early passages of the book, and in what ways can her death be considered the fault of other characters?

Sarah and Bendrix are alone in his house when the V1 rocket hits. After the attack, how does the building itself function as a metaphor within the text?

As a writer, Bendrix feels compelled to tell his story. How is the act of writing (and the literature it produces) portrayed in the book?