In the 19th century artists at all skill levels learned how to shade a form correctly. Many even well known artists of today have less technical skill than a so-called amateur artist of the late 1800's. This reprint from Dover Books was published in 1900, way before the attack on "Academic" art in favor of the propoganda espoused by 20th century artists, museum curators, critics and teachers that proclaimed that classical drawing was passe and that artist's didn't need to learn technique before "expressing" themselves. Well, if you want to learn to expressive yourself masterfully when you shade a form, I would heartily recommend this book. Although concentrating on charcoal shading primarily, and pencil hatching in a secondary sense, the information presented here is clear and will translate well into any media. It's a very reasonable price, easy and quick to read, and has information that is rare to find in the rash of "how to" books of today written by artists with barely passable skills in drawing and shading.