Back in college, two decades ago, one of my art professors required this book for every single one of his classes. He even offered to personally repay students who could not afford to keep their copy, if they promised not to sell it back to the bookstore. He told us that the best thing we could do for our careers in art was to keep this book. He was right. I've had my 2nd edition copy for twenty years, and no other book I've seen discusses visual theory so simply, logically and completely. The text is clear and straightforward and the examples are perfect, but it is Lauer's ability to organize a very complex subject into very specific, clearly-understood categories that makes this book remarkable.