When the Supreme Being and his son decide that being supreme isn't for them any more, it's inevitable that things get a bit of a shake-up. It soon becomes apparent that our new owners, the Venturi brothers, have a very different perspective on all sorts of things. Take Good and Evil, for example.
The third novel in Annie Murray's "Birmingham" series. While Genie's father is away fighting in World War II, her mother has a ruinous affair which leaves her pregnant; Genie's little brother leaves, never to return; while Genie herself meets a man who then disappears to war.