The legendary Claude C Hopkins wrote 'Scientific Advertising', his classic on the art of advertising, nearly 100 years ago. It is a tribute to the vision of this pioneer of modern advertising that the insights contained in this slim volume remain, for the most part, relevant today. Digital channels may have superseded the print media that dominated in his day, but the principles of how to create a compelling message that sells to potential customers are as true now as they were when Hopkins was formulating them. Alastair Campbell cites Hopkins as a major influence in his successful marketing career. He has approached the task of revising and updating 'Scientific Advertising' with the care and reverence of an acolyte, and the experience of putting these theories to the test in today's marketplace. Readers will find up-to-the-minute references and examples drawn from the world of television, the Web, social media, handheld digital devices, live streaming and options for instant communication that Hopkins could not have anticipated but which we now use daily.