• Annie Tat was our original layout designer. She sketched and crafted multiple designs, and produced an exemplar chapter whose look would be applied to all subsequent chapters.

• June Au Yeung and Lindsay MacDonald tranformed our rough drafts – raw text and images – into this layout. They were the ones in the trenches, where both worked hard at tuning each chapter’s layout to fit our material, and at responding to all the other chores given to them.

• The students in the Interactions Laboratory at the University of Calgary were a constant source of inspiration: sketching and designing was fundamental to how they produced beautiful systems. We learned from them, and we use some of their work as examples in this book.

• More broadly, the HCI community and the Design community are an incredible intellectual source. We don’t pretend to have invented all the methods in this book. We read many articles and books that spoke about sketching and design. We cruised the web and saw wonderful examples of sketches and videos that people had made. We looked at other educators’ web sites to see how they taught design. We spoke to colleagues and professionals, and soaked in their knowledge.