You will be able to learn about the simplest principles of how light, shade and shadow work on geometric objects. With the knowledge of those simple principles, you can level up to expressing the more varied surfaces of organic subjects like fruits and the human face (not covered by this book). I can tell from the 1st chapter that W.E. Sparkes teaches in a very concise, practical and effective way. There are experiments and activities for every aspiring artist to do. If your curiosity has led you up to this point like mine has, go check out this book.