Book excerpt: - Consolidate knowledge with clear, focused and relevant content coverage, based on what examiners are looking for - Develop understanding with self-testing - our regular 'Now test yourself,' tasks and answers will help commit knowledge to memory - Improve technique through exam-style practice questions, expert tips and examples of typical mistakes to avoid - Plan and manage a successful revision programme with our topic-by-topic planner, new exam breakdown feature, user-friendly definitions throughout and questions and answers online