This is the first book to systematically cover the modelling of emotions and emotional states in human decision-making and to describe how human problem-solving may be integrated with intelligent technologies and intelligent agents. The result is an intelligent multi-agent architecture whose application is described in real-world applications of the internet in business. The authors' expertise covers research and real business and industry experience in computer science, management, HCI and computer vision and e-business, thus providing a well-balanced survey of an important multi-disciplinary topic.