John Brennan is a Senior Lecturer in Environmental Design at the Edinburgh School of Architecture and Landscape Architecture, the University of Edinburgh. He is also a practising architect whose built works include collaborations with James Turrell and a series of awards including the Saltire prize for housing, and most recently the Scottish Homes award for best house in 2011.

David Allen is the internationally bestselling author of Getting Things Done and Ready for Anything. He is the chairman and founder of the David Allen Company, a global management and consulting company, widely recognized as the world's leading authority in developing personal and organization capacity.