This book brings together twenty of the most important papers by the last Professor Peter Rolfe Vaughan on geotechnical engineering. Selected by Peter’s closest colleagues at Imperial College and the Geotechnical Consulting Group, these papers are reproduced along with the obituary published in Geotechnique, a full listing of his bibliography, some photographs and personal reflections by David Hight, David Potts, Nebojsa Kova; and Finlay Jardine on working with Peter.