Arresting and wonderful, “The Accidental” pans in on the Norfolk holiday home of the Smart family one hot summer. There, a beguiling stranger called Amber appears at the door bearing all sorts of unexpected gifts, trampling over family boundaries and sending each of the Smarts scurrying from the dark into the light. A novel about the ways that seemingly chance encounters irrevocably transform our understanding of ourselves, “The Accidental” explores the nature of truth, the role of fate and the power of storytelling.