I agree that adding the ISBN to the CSV is important — really, it’s the key to making all the other improvements to checkout history management useful. Several releases ago, I believe we were able to add this to the CSV locally as part of an action trigger, but that’s not possible anymore (more on that here: Launchpad #1208875) Although not all titles have an ISBN, most books do, and it’s the key to interacting with other systems: GoodReads, Google Books, etc.
