I bought this book in anticipation of learning more about adding shadows in watercolour paintings. And yet I am disappointed to find many pages taken up with subjects such as "keeping a sketchbook", "Perspective", "Importance of Drawing" and a whole chapter dedicated to the subject of equipment.
This appears to be a common problem with artists who take up writing books: an inability to focus and remain within the stated title and purpose of the book - and it annoys me no end. Having said that, there are some interesting examples of shadows in this book, but here yet again, we have an author who insists and thus promotes the use of the low-permanent Alizarin Crimson - and professional artists should, by now, know better. Most artists I know have long since moved over to using a better substitute colour, such as Perylene Maroon. People are buying this book to learn about sunlight and shadows, but the author deviates from its central theme in such a way that makes it difficult to give a good recommendation.