She presents the basics of building a strong composition, and using preliminary sketches, as the problem of making an effective flower arrangement. Kunz has a fine painting style that is crisp enough to seem real, yet soft enough to feel painterly rather than mechanical. There is a long middle section addressing many technical specifics, from grading a wash to mixing greens to painting a crystal glass vase. Kunz's approach is delightfully low key. A single short paragraph at the end of the first chapter sums it all up.
Watercolor painting is a very personal experience.
You are in charge. Have faith in your own ability to know what works for you. The aims and methods in this tradition have remained much the same for over 300 years, weaving the individual efforts of thousands of artists in a common family of visual designs. As Wunderlich says, some of these basic techniques were discovered and standardized centuries ago. The section on drawing plants, by itself about one quarter of the text, links perspective to the geometric forms of leaf and flower.