PREFACE By Alfonso and Nicola Vaccari Receiving the request to collaborate to create the illustrations for a colouring book, we accepted with enthusiasm, not only because this kind of publication has obtained success worldwide, but also because the colouring book bring us to the period of the first approaches to the colour and drawing during childhood. Nowadays the colouring book is set forth adult usability, knowing from psychology studies the high therapeutic power of colouring and the importance to express themselves freely in a creative field.