Aren't challenges much more fun when they have a button? I'm just terrible at creating them. Thankfully, there are others more gifted in the art of button-making.
Caitlin at chaotic compendiums has come up with this button for The Complete Booker 2010 challenge, and I have duly adopted it for use by all challenge participants. Feel free to use it, and resize as needed. I recommend downloading to your own computer and/or storing your button at a site like Photobucket or Flickr.