Max Adams explores Britain's lost early medieval past by walking its paths and exploring its lasting imprint on valley, hill and field. From York to Whitby, from London to Sutton Hoo, from Edinburgh to Anglesey and from Hadrian's Wall to Loch Tay, each of his ten walk narratives form a portrait of a Britain of fort and fyrd, crypt and crannog, church and causeway, holy well and memorial stone.