A Wrinkle in the Skin
A Wrinkle in the Skin is also known as The Ragged Edge.
A massive series of powerful earthquakes on a worldwide scale reduce towns and cities to rubble and plunge the survivors into barbarism. Most of western Europe is dramatically uplifted, transforming the English Channel into a muddy desert, while elsewhere lands are plunged below sealevel and flooded.
Matthew Cotter, a Guernsey horticulturalist, finds himself one of only a handful of survivors on the former island. Cotter decides to trek across the empty seabed to England, in the faint hope that his daughter has somehow survived.
John Christopher
Christoper Samuel Youd, a.k.a. John Christopher (1922-2012), was a British science fiction author. He is best known for The Tripods trilogy.