This two-volume handbook set introduces the state-of-the-art development in research and applications related to usability and user-experience. Volume one includes methods and techniques and volume two covers research and case Studies. This handbook set is essential for everyone that is interested in understanding how the principles of usability and user-experience can contribute to a design that ensures that the needs of the users have been properly met. The books will cover several areas, such as the conceptual aspects of usability and user-experience, the knowledge of human characteristics in design, the methodological aspects; the books will include intervention, examples of consumer products, digital systems, and augmented and virtual realities. This set will be of interest to those working in the fields of ergonomics, designers, engineers, as well as students and practitioners.