Even Einstein said "if you can't explain it simply, then you don't understand it". This book is the simplest explaination of what really matters in marketing and while you can read the most complex detailed marketing texts in the world, if you read this book in 30minutes you know most of what you need to know. If you are in marketing, this book is invaluable - if you ever need to present to a non-marketing audience, your presentation is already written for you, or better still give copies of it to your team or your colleagues. If you are not in marketing, read this book for invaluable and straight to the point insight.