It's almost a genre, but maybe not quite. A mysterious stranger comes to town and transforms every life he or she touches. Works in this almost-a-genre range from Mary Poppins to Brimstone and Treacle, from An Inspector Calls to Teorema. A number of westerns- including several Clint Eastwood westerns- qualify. In Smith's treatment of the theme the angel is an ageing hippie chick and the people she turns over are a middle-class family on holiday in Norfolk. I liked the 12 year old daughter best- Smith does a grand job of getting inside her head- and the womanizing husband least- she makes him awfully soft- and has him think in verse- which is something no novelist should ever attempt. You want to lose your readers? Try tossing them a sonnet.