In What I Know I Cannot Say / All That Lies Beneath, Dai Smith combines a novella and a linked section of short stories to create a dazzling fictional synthesis that takes the reader on a tour of the South Wales Valleys during the twentieth century. What I Know I Cannot Say presents a moving and vivid panorama of twentieth-century Wales, brought to life by Smith's meticulous attention to historical detail and a distinct gift of invoking the smells, sights, and sounds of the past. All That Lies Beneath is white-knuckle fiction ride: power, sex, money, and ambition all twist through the pages as Smith creates a feast of intellectual and physical provocation in stories that send a shudder of fearful recognition directly through to the reader.