This image has been making the rounds on Facebook. Like many images on the open web, its original source is unknown; it has appeared on multiple sites, sometimes with the lolcats-style statements such as "touche, Barnes and Nobles" or "Ohh, My Favorite Series" or "Now It's a Real Mystery."
In other words, the image itself is a mystery. Pretty great, though -- clever and funny. The signage certainly suggests the, uh, incident occurred at a Barnes and Noble somewhere. Who did it? We'll probably never know. Maybe others will be inspired to reenact this shenanigan elsewhere. Maybe some day someone will take credit with being the first, but it will be difficult to prove.