I just designed a batch of buttons for GR Reads. I did the blue one for each staff person but then designed additional buttons that use the cover art of the 10 chosen books. One of my favorites is the raccoon from the cover of At Least in the City Someone Would Hear Me Scream. I had several staff people react in disgust and say "I won't put that thing on me!" I also really like the cover of Stealing Buddha's Dinner, with the arrangement of junk food, so that made a nice button as well.