A reader of this blog wrote in yesterday in response to my post on Charles Reid's books and recommend that people read Dong Kingman's book. I assumed Chris meant Dong Kingman's Watercolors. I'm waiting to hear from Chris if that's correct (a couple of you have asked me to find out). In the meantime I can tell you that's a good book, though I read it many years ago and isn't a book I have so I can't give you specifics on it.
If you would like to know more about Dong Kingman you can google about on the web, but I recommend that you go first to Danny Gregory's blog and check out his September 20, 2008 post on Kingman, which includeds a wonderful short film about the artist that I'm sure you'll enjoy. (Danny recommends the book that I've given you a link to above.)