One author is a horticulturist, the other an editor. The title says it all. The book gives many concrete hints for landscaping that looks nice, whatever your area of the country. Many are common sense: planting items requiring alot of watering near hoses; planting items that grow well in your area, rather than exotics requiring alot of work. But it also has some interesting, innovative ideas: easy growing roses, night gardens.I give it four rather than 5, because to *really* make the 20 minutes work, you need to hire someone to do the mowing.