This document appears to be the introduction or table of contents for the third edition of the Upper Intermediate level of the business English textbook called Market Leader. The textbook contains 12 units covering various business topics such as communication, marketing, relationships, success, risk, and more. Each unit includes discussions, readings from publications like the Financial Times, listening activities with business interviews, language reviews, skills sections, case studies, and sections on working across cultures. The introduction provides an overview of what students will find in each unit and section of the textbook. It was written by the three authors of the textbook: David Falvey, David Cotton, and Simon Kent, who have extensive experience in teaching and training in business English.