A repertoire of Celtic patterns including all the main branches of traditional Celtic ornament and its use in decorating letters. Great works of art, such as the Book of Kells and the Book of Durrow, were created by several artists working together, one drawing in pen and ink and the other filling in the outlines with colour. Here the reader is invited to fulfil the role of painter, while being guided by notes on the history of the designs and on the choice and order of the colours.