This is how to think about the face when you're painting it. Frederic Fiebig - Facial planes example I am interested by the geometric shapes and brushstrokes that are simple and abstract by themselves but when together create a recognizable portrait.
This book cover shows excellent figure ground/negative space. The contours formed by the position of the fox serve as the shape of a boy, I'm assuming "Peter." This empty space also creates a wonderful focal point for the book title to nestle into.