Foreword / Paul Saffo — Preface — Part 1. Computer obliteracy. Chap. 1. Riddles for the information age — Chap. 2. Cognitive friction — Part 2. It costs you big time. Chap. 3. Wasting money — Chap. 4. The dancing bear — Chap. 5. Customer disloyalty — Part 3. Eating soup with a fork. Chap. 6. The inmates are running the asylum — Chap. 7. Homo logicus — Chap. 8. An obsolete culture — Part 4. Interaction design is good business. Chap. 9. Designing for pleasure — Chap. 10. Designing for power — Chap. 11. Designing for people — Part 5. Chap. 12. Desperately seeking usability — Chap. 13. A managed process — Chap. 14. Power and pleasure.