Usually, bookstores display their titles on the appropriate shelves — Stephen King in the Fiction section, Kurt Vonnegut in the Obnoxious College Freshman section, Dan Brown in the trash can — it's pretty much all that those employees have left to do these days. But sometimes, and apparently way more often than we thought, mistakes are made. We probably would have caught onto this phenomenon sooner if anyone had walked into a Borders in the past six years.