User blog comment:SayuriDarling/Rick Riordan Tour Dates & Q/A Session/@comment-4521561-20120925205121

Heads up! The Barnes and Noble's website has a picture of the cover that has a sticker on it that says "Exculsive never before seen Argo II model inside."

http://www.barnesandnoble.com/w/the-mark-of-athena-rick-riordan/1108621085?ean=9781423140603