St. Martin's Books-Crystal Cave Collection Book. The Ultimate Geometric Coloring Book is a gorgeously unique, geometrically- inspired collection of designs that will be irresistible to coloring enthusiasts. Inspired by ancient geometries from Celtic, Greek, Islamic and Tibetan civilizations, the eight-five unique designs can be colored in a nearly infinite variety of patterns and will provide hours of relaxation, mindful calm and creative stimulation. Artist: Ensor Holiday, Roger Burrows, Roger Penrose, John Martineau and Haifa Khawaja. Softcover, 96 pages. Published Year: 2015. ISBN 978-1-63286-627-1. Imported.