In this fourth edition, Bryan Lawson continues his discussion, trying to understand how designers think. He does this by mapping out the issues concerned with the design process, with design problems and solutions and design thinking. This edition adds to the previous debates by including a new chapter on 'Design as Conversation' reflecting on how designers, either consciously or unconsciously, monitor, reflect on, control and change their thinking. It also includes a new series of case studies on notable designers including the racing car designer Gordon Murray, product designer James Dyson, and architects such as Edward Cullinan and Glenn Murcott.'An extremely readable book, due in part to the soundbite-sized chapters' Architects Journal, 19.01.06 Reviews of previous editions: 'It has a great virtue of being thorough and readable... excellent bibliography.' Built Environment 'This book makes a valuable, if individualistic contribution to the literature of design theory.' Science and Technology Press 'The author succeeds in demystifying his subject for the lay reader.' New Scientist 'The chapters are well written in a readable form and packed full of data undeniably valuable to students.' ASI Journal 'Its success is well deserved, because it is clearly written, the arguments are logically presented, and the design process is indeed demystified.' Architectural Science Review