Matt Hall and Evan Bianco of Agile Geoscience have put together this great new book. I have been fortunate to have my article on colourmaps included as one of the 52 essays in the book. You can order the book directly from Agile’s publishing company Agile Libre:
or you can order it on Amazon. For a look inside it, check here!
I find the Color Use Guidelines by Cynthia Brewer (of Color Brewer fame) very well done and extremely useful. Below is a screen captures of the main page. To see an explanation of and example for each color scheme visit the interactive guidelines.