This book is designed to raise students' awareness of the linguistic features of a postgraduate dissertation/thesis written in English. It deals primarily with the linguistic aspects of extended pieces of writing, placing great emphasis on the writer's responsibility for the readability of the text. Each of the features introduced is illustrated through examples taken from authentic writing at the appropriate level. In addition, each chapter has a number of tasks to help students put into practice the skills that have been introduced. This book is mainly designed to help research students whose first language is not English, but it should also prove useful to native speakers of English, many of whom lack extensive experience of writing at this level. It can be used as a textbook for postgraduate students on a dissertation/thesis writing course, and may also be used as a self-study guide since an annotated answer key is provided for all the tasks. This book takes a realistic approach to helping students who may find the extended writing required at postgraduate level a daunting task; although it provides ample opportunities for practice, it does not expect students to produce extensive writing beyond that required for their degree.