Imagine someone forced you to create a new bestselling product or service. "Or else", they said, and you believed them. You have no marketing budget, and this product or service must have sustainable success. This book starts you off with the right questions - What makes one product sell and another fail? What fuels the success of best-sellers? - and takes you down the path. With a combination of hard-working graphics and strong practicality, Kathy Sierra shows you how to make your users badass. Ideal for product developers, designers, UX folks, programmers, architects, product designers, marketing teams, and start-ups.