Design is fundamental to our modern world. All human achievements, great and small, owe their being, in no small measure, to the concept of design. Whether it is in social and technological innovations, great human endeavours, building and construction projects or simply the environ and desire of the individual, design has been there. But a question remains: what goes on inside the designer's head? For many decades now researchers, philosophers and academics have pondered this question. In this book Dr. Marisha McAuliffe focuses on the notions of imagining and design to interrogate such a question. In this book McAuliffe's outlines her seminal work, as a design practitioner and academic over many years, to expand our understanding of imagining in the spatial design disciplines of architecture and interior design. This book is compulsive reading for the design professional, the student of design and those who have pondered, what goes on inside the designer's head?