Studio Vista, (The Overlook Press U.S.), 1976 (Out of Print, sadly; s/h copies may be available)
The art of Islam attained one of its most characteristic forms in elaborate, highly articulated geometric patterns. This art, familiar from mosques throughout the Islamic world, has been developed to a great beauty and complexity across the centuries by dedicated but anonymous artists. The results rank among the highest pinnacles of art anywhere. This book is a thorough study of the intricacies of these forms.