Art By Nature: An Adult Grayscale Coloring Book Featuring A Curated Selection Of Ernst Haeckel's Illustrations of Ocean Life And Nature

 This book contains 40 vintage illustrations by Ernst Haeckel (1834 - 1919) depicting various organisms, shapes and creatures of the sea, digitally altered to create grayscale coloring pages on a black background. The images are displayed in grayscale and designed to be colored primarily with colored pencils, markers, gel pens and fine-liners. Coloring sheets are printed separately with a black backside to prevent bleed-through and allow you to easily remove and frame your favorite ones.