About Face 3: The Essentials of Interaction Design : This completely updated volume presents the effective and practical tools you need to design great desktop applications, Web 2.0 sites, and mobile devices. Youâll learn the principles of good product behavior and gain an understanding of Cooperâs Goal-Directed Design method, which involves everything from conducting user research to defining your product using personas and scenarios. Ultimately, youâll acquire the knowledge to design the best possible digital products and services. NOTE: This is a Scratch and Dent book and may have noticeable dents, scratches and various other cosmetic issues as well as torn or missing dust jacket. These items are only guaranteed to be structurally complete and readable and therefore are sold as is.