Quite a few already. Taking it as a good sign. I'm a little stuck on what to use...

okal on Feb 14, 2012 | parent | context | favorite | on: Show HN: Hackershelf. Community curated collection...

Quite a few already. Taking it as a good sign. I'm a little stuck on what to use to ensure uniqueness. Members might submit different editions of the same book, so title alone probably wouldn't suffice as a constraint. The homepage, perhaps?