Book excerpt: Illustrated with photographs from the private family album, this book follows in the footsteps of some of Sir Winston Churchill's famous trips to the four corners of the world, by his granddaughter Celia Sandys. She visits South Africa, Morocco, France, the USA - amongst others - and recounts how Sir Winston's trips not only changed the course of world history, but helped to shape the man who has come to be known as 'our Greatest Briton'.