One of the first really exciting painting resources I remember discovering online was Bruce MacEvoy’s website handprint. When I was actively engaging with my limitations as a watercolor painter several years ago, his comprehensive section on the medium was invaluable. Lately, I have been enjoying exploring the newer section on color vision. Mr. MacEvoy presents his subject matter with clarity and depth. Both sections include extensive references to other valuable books and websites. If you have time for nothing else, take a quick look around the page on watercolor books, which are logically organized and presented with insightful summaries. The only danger– you might end up with a pretty long wish list for your own library!