Dan Roam discovered the power of visual thinking and pictures for solving business problems in the 1990s when founding a marketing firm in Russia. With no language skills, he found pictures helped overcome barriers. Since then, Roam has worked with companies like Microsoft, eBay, and Walmart to solve complex problems using visual tools introduced in his book "The Back of the Napkin". The book is an international bestseller and has been published in 25 languages.