The proof copy of this that I read was titled 'The Visitors', but it's now called 'After Me Comes The Flood'. It's a very strange book indeed, but I think a very good one. John Cole decides to leave his life in London behind, and visit his brother in Norfolk. On the way he becomes lost, and his car breaks down. He finds a house where he hopes to arrange help, but, inexplicably, the eccentric residents seem to know him, and to be expecting him. It's very hot, he is confused and tired, so he decides to rest and gather his thoughts.