John Mueller
The previous books do not need to be read to appreciate "Emotional Design," but that would enrich the feeling of synthesis that is reached in the fourth volume. Norman's past efforts have focused largely on long neglected usability issues, but now his work moves to combine functionality with aesthetics, and with rational explanation. Norman describes his personal journey in the final chapter on "Personal Reflections." I recommend that chapter be read first, as an orientation for newcomers to the everyday-things series, or as refresher for those who have read the earlier volumes.