The book "ABC of Speaking" by Heidi Puffer is a comprehensive manual aimed at anyone looking to improve their speaking skills. It is not only targeted at actresses and singers but also at managers, politicians, teachers, and anyone who speaks in public. The author, an experienced speech coach, explains the various factors and processes involved in speaking. The book offers systematically structured exercises that are easy to follow and help readers optimize their speaking technique effectively. It covers all important aspects of communication, including breathing, posture, and voice usage, and provides practical tips for different speaking situations such as theater, speeches, or exams. The clear explanations and the provided feedback forms allow for individual analysis and improvement of one's speaking style.