Book excerpt: Perfect for revision, these guides explain the unit requirements, summarise the content and include specimen questions with graded answers. Each full-colour New Edition Student Unit Guide provides ideal preparation for your unit exam: - Feel confident you understand the unit: each guide comprehensively covers the unit content and includes topic summaries, knowledge check questions and a reference index - Get to grips with the exam requirements: the specific skills on which you will be tested are explored and explained - Analyse exam-style questions: graded student responses will help you focus on areas where you can improve your exam technique and performance