This is a comprehensive textbook of radiotherapy and related radiation physics and oncology for use by all those concerned with the uses of radiation and cytotoxic drugs in the treatment of patients with malignant disease. Best known as 'Walter and Miller', over the years this book has become the core text for therapeutic radiography students and an important introductory text for trainee radiologists and clinical physicists. It is divided into 2 parts: the first covers underlying principles of physics and the second (and longer) part deals with radiotherapy and oncology. The book underwent a major overhaul and expansion (of part 2) in the previous edition, which firmly established it as the outstanding work of its kind in this field.