Travelling a thousand miles and across three billion years, Christopher Somerville sets out to interrogate the land beneath our feet, and how it has affected every aspect of human history from farming to house construction. In his journey, Somerville follows the story of Britain's unique geology, travelling from the three billion year old rocks of the Isle of Lewis, formed when the world was still molten, down the map south eastwards across bogs, over peaks and past quarry pits to the furthest corner of Essex where new land is being formed by nature and man. Demystifying the sometimes daunting technicalities of geology with humour, Somerville's book tells a story of humanity's reckless exploitation and a lemming-like surge towards self-annihilation but also shows seeds of hope as we learn how we might work with geology to avert a climate catastrophe.