"Delzart's System of Public Speaking" is an important book in the world of public speaking, written by an outstanding expert in this field, Eugene Del. In his book, he reveals the methodology of training the body and voice for successful performances in front of an audience. Indeed, this book is an essential reference for anyone who needs to master the art of public speaking, regardless of the field of activity. By studying Delzart's methods, the reader will have the opportunity to develop confidence, clarity and effectiveness in communicating with an audience.