How do you divide a line into three? Or five? Or seven? Is there a simple way to marry harmony and geometry? What is the secret diagram alluded to by writers of antiquity? In this groundbreaking book, philosopher Adam Tetlow reveals the long lost Helicon, the master diagram of the ancient arts and crafts.Watch in astonishment as this magical geometric figure produces simple fractions, musical harmonies, Pythagorean triangles, perspective and more. WOODEN BOOKS are small but packed with information. "Fascinating" FINANCIAL TIMES. "Beautiful" LONDON REVIEW OF BOOKS. "Rich and Artful" THE LANCET. "Genuinely mind-expanding" FORTEAN TIMES. "Excellent" NEW SCIENTIST. "Stunning" NEW YORK TIMES. Small books, big ideas.

Do you ever stare at patterns and wonder how to construct them? Are you ever captivated and inspired by Celtic or Islamic art? Do you ever think about the illusion of depth perspective that your brain builds from your senses? Are you aware that symmetry informs your feeling of what is right? Is there a Golden secret which is hidden in nature and all the traditional arts? Packed with information and exquisite illustrations by more than twelve expert authors, DESIGNA is the ultimate sourcebook for visual artists, artisans and designers of every kind.

How do you draw Celtic knotwork? What are the secrets of keys? Are there tricks for drawing Celtic spirals? What do these mysterious patterns actually mean? Who drew them? Where did they come from? In this exquisite pocket book, author and artist Adam Tetlow shows us the practical tricks of the trade and the hidden principles behind the ancient magical science of Celtic artwork. With examples from both early and later periods, illustrations by the author and rare engravings.