I did a quick skim through of this book. As I had to return it to the library.

It's not a technique book. The first 15 pages go over some techniques he used.

I like how he showed how and why he modified the photographs in his final watercolor. He starts often with a value sketch--which is what I need to start doing. While he doesn't show step by step techniques, he does show many different techniques as well as some instruction--even if it is barebones. He does show his color scheme. Which is helpful.