Home › Authors › Jeffrey Jacobi 👤 Jeffrey Jacobi 5 books Books by Jeffrey Jacobi How to Say It Persuasive Presentations (How to Say It) 2006 How to say it with your voice 2000 The Vocal Advantage 1996 Executive Voice Trainer/Workbo Executive Voice Trainer/Workbook and Cassettes 1990 The Art and Skill of Conversat The Art and Skill of Conversation 1989