This is an original book that will expand your painting skills by providing you with techniques to approach painting through negative spaces. Everything is explained meticulously in step by step diagrams that leave nothing unclear. It is a valuable addition to painters who want to expand their repertoire of skills. However, the technique explained in this book, fascinating as it is, has its limitations, as it can only work in pictures where the negative spaces are darker than the positive ones (you will understand how and why when you read it). Should the painter want their negative spaces to be lighter in color than the shapes depicted, this technique would not work.
Maybe it is a first step and the author, or somebody else, can expand the possibilities of this technique further; what we learn in this book is certainly not the last word on negative-space painting. The author explores mostly landscapes, and the results of her specific approach gives results that are highly original, but that have a specific eerie-spooky character. Since I haven't tried applying the technique yet, I cannot tell whether that eerie quality is an inevitable consequence of that technique, or is it the result of the author's/painter's specific choices, and whether a different painter could get results of a totally different quality.
Despite these limitations, it is a very useful approach to get to know, especially for painters who do not just want to learn a new trick, but who also want to learn how to see in new ways. Highly recommended.