Nancy Duarte is a communication expert and the CEO of Duarte, Inc., the largest design firm in Silicon Valley. She is the author of three books on presentation skills: HBR Guide to Persuasive Presentations; Slide:ology: The Art and Science of Creating Great Presentations, which has been translated into eight languages; and Resonate: Present Visual Stories that Transform Audiences, which spent 300 days on Amazon’s top-100 list of bestselling business books.