Informal is a terrific read; it places me right at the table as the author engages with his architect collaborators pursuing innovative building designs. The range is fascinating, from a box shape in the Villa Bordeaux to a curvilinear form in the Arnhem Interchange to the serene and effortless canopy in Lisbon. In each project the author establishes simple initial moves which lead ultimately to new configurations and importantly develops throughout the book a rigorous basis for exploring the non linear. This is welcome in an age when so much architectural form making is whimsical. As an architect I was fascinated how this book also brings out the lyrical and poetic inherent in structure. Best of all perhaps is the 27 sectioned speculation at the end on the anatomy of form, and an insight into the structure of organisation itself. In conjunction with his intriguing earlier book Number 9 Balmond sets out a new agenda for designers everywhere, including architects and engineers.