Many generations ago the Wall was first built to hold back the sea. Northland, a country of fertile plains and ancient forests rescued from the ocean, has become a thriving civilisation based on trade, technology and tradition, centred on the ancient home of the first builders, Etxelur. The whole of Europe, spanned by the Northlanders' steam caravan lines, has been changed in ways that could never have been predicted.
But nothing can last forever, not even the Wall. The weather is changing, growing colder, and in the wake of the long winters come famine, destruction and terror. And as whole nations are forced out of their lands and head for warmer climes, it seems that even Northland may not be able to endure.
Stephen Baxter is the pre-eminent SF writer of his generation. With Terry Pratchett he has co-authored the Long Earth novels. Published around the world he has also won major awards in the UK, US, Germany, and Japan. Born in 1957 he has degrees from Cambridge and Southampton. He lives in Northumberland with his wife.Visit Stephen Baxter's website at www.stephen-baxter.com.