Acknowledgments Assembling a book with such diversity requires the dedication and skills of many peo- ple. With 53 contributors from 25 companies representing 20 countries, there were more than a few details to manage. None of this could have been done without the combined and consistent support of an outstanding group of professionals, my lead contributors: Agnieszka Bojko, Tim Bosenick, Tjeerd de Boer, Frederic Gaillard, Simon Herd, and Thomas Visby Snitker. These contributors were tireless in the coordination, development, and dedication to delivering the quality work in their particular chapters. They also provided constructive comments on other sections of the book. The individ- ual contributors to the chapters (listed in the Author Bios) gave of their precious time to provide insights into the book as a whole and to specific chapters. Their knowledge of and experience in the field of user research provided the foundation on which this book was written. Equally important to having the book written from the viewpoint of collaborators throughout the world, it was important to have reviewers globally who represented a