Gravity Falls: Don't Color This Book!Geared toward young adults and adults, this magical coloring book features themes and characters from Gravity Falls. Geared toward young adults and adults, this magical coloring book features themes and characters from Gravity Falls. The Pines twins find themselves on a prismatic adventure when Dipper gets trapped in a magical coloring book! The only way out is for Mabel to color him to freedom with the help of a strange new friend named Chamelius