I chose some random physics book that was good for all of one bottle ($3.08)!

Columns of kegs, cases, bottles need titles (icons are shockers), get a designer to help out in general too. I think the concept has potential as a viral gimmick that makes people think about selling old books, but your execution will need to look a little better before I passed the link around.

Maybe suggest a fake book title for those who just want to kick the tires and see how it works?