The story of the Earth is written into our landscape: it's there in the curves of hills, the colours of stone, surprising eruptions of vegetation. Wanting a fresh perspective on her own life, the writer Helen Gordon set out to read that epic narrative.

Her odyssey takes her from the secret fossils of London to the 3-billion-year-old rocks of the Scottish Highlands, and from a state-of-the-art earthquake monitoring system in California to one of the world's most dangerous volcanic complexes in Naples. At every step, she finds that the apparently solid ground beneath our feet isn't quite as it seems.