16 black and white postcards, coloured by youCity Colour is a beautiful addition to the adult colouring genre, and a delightful alternative to flowers and mandalas.These scenes of inobtrusive, almost unseen urban places offer a creative and satisfying colouring challenge. Graham Falk is first and foremost an animator; when he draws, he instinctively leaves room for a colourist. That doesn't just mean colour either: shadow and shade are equally important. If you want one tip for colouring these, it's simple: decide where the sun is, and take it from there. (With sharp pencils for tiny details.)