SUGAR SKULLS COLORING BOOK MORE THAN +40 SKULL DESIGNS Coloring Book For Adults: Sugar Skulls: Stress Relieving Skull Designs for Adults Relaxation, this adult coloring book has MORE THAN 40 designs featuring a broad range of SUGAR SKULLS to provide hours of fun, calm, relaxation and stress relief through creative expression. Designs range in complexity and detail from beginner to expert-level.