I am at work grading tests etc. but this one sounded like fun so I wanted to try it with the books that I had in the office (skipping out textbooks - with one exception - Indigo was really hard to find!).
This is what I came up with ...
I topped off the pile with Color by Victoria Finlay because it seemed appropriate but here are my rainbow books
Black - Spook by Mary Roach
Violet - A Walk Through Time by Sidney Liebes, Elisabet Sahtouris and Brian Swimme
Indigo - Practical Forensic Microscopy by Barbara Wheeler and Lori Wilson
Blue - Maps, Myths and Men by Kirsten Seaver
Green - sleeping naked is green by vanessa farquharson
Yellow - Crude: The Story of Oil by Sonia Shah
Orange - Cadillac Desert by Marc Reisner
Red - No Impact Man by Colin Beavan
White - Your Inner Fish by Neil Shubin (it just looks odd because of the desk color)
Now I want to do this at home too for a fiction version - since everything in that list is nonfiction.