This is an excellent book. It's very interesting and was the first book of it's kind that I have read. I gives color and light suggestions for different environments such as schools, office spaces, etc. It gives detailed scientific information about why these colors and types of light are good to use in these environments that is easy to understand. I think this book is a must have for all interior designers who care about the effects the environment they design will have on the people that will be in it!