In her new novel, 'Home', Marilynne Robinson revisits the people and places featured in her novel of a few years ago, 'Gilead' - a book which won her the Pulitzer Prize. It brought us the figure of John Ames, a Kansas preacher who talked about life and belief in a letter to his six-year-old son. 'Home' centres on Ames' best friend, Boughton, and two of his children, Jack and Glory. And so in many ways it's a companion piece to 'Gilead', a novel with the same characters and which takes place in the same time frame. But the focus in this one is on Jack: gone for 20 years, the prodigal son now back home again and trying to make peace with his past. 'Home' is published by Virago.