Celtic art beguiles the eye and sings to the heart. It is grounded in the mystical understanding of number. In Celtic Pattern, author and artist Adam Tetlow makes accessible the complexities of this ancient tradition. He answers the myriad of questions surrounding the style: How do you draw Celtic knot work? What re the secrets of keys? What do these patterns actually mean? Who drew them? Where did they come from? In a book as beautifully designed as it is original, and full of illustrations by the author and rare engravings, Tetlow shows us the hidden principles behind the ancient magical science of Celtic artwork.