Nice app. Easy to use and has a nice look. A couple of features that would top this app off would be the ability to have it also show all the books in a series (for example) to make it easier for people to see what books they may be missing when trying to complete a set. It would then also need to have a check box to indicate if the book is in the library or not  and having the app automatically offer to complete the series when a book is scanned in would be grand.