Scott Hurff has been building web and mobile products for over 15 years. Currently Head of Product at a Kleiner Perkins-backed Tappy, he teaches design prototyping in both Quartz Composer and Xcode, and is writing “How Product Designers Work”. Based on interviews with over 20 product designers from companies like ZURB, Facebook, and Medium, it’s a book that aims to understand how some of the world’s most talented product designers do their jobs.