User-interface designer Mathis advises visual designers, developers, and product managers to listen to their users (but not too much) when designing applications and websites. The book is structured in three sections on user and product research, design (the bulk of the book), and implementation. Some areas explored include creating hierarchical structures visually, sketching and prototyping, discoverability, and guerilla usability testing. Across these three sections, the book offers two types of chapters on techniques and ideas. Technique chapters explain how to use specific techniques and give examples as applied to a fictional Twitter application designed throughout the book. Idea chapters offer inspiration on subjects such as text usability and replicating physical constraints in digital products. The book's reader-friendly layout features b&w screenshots and diagrams labeled in comic book script. A companion website offers links. The book is distributed in the US by O'Reilly Media. Annotation ©2011 Book News, Inc., Portland, OR (booknews.com)