add at least one library! Otherwise there is nothing to add items to.
Once you've added a library, you can tap on that library name to bring you to the item list page.
At the top of the item list page there are two options for adding items:
Barcode: lets you either scan a barcode, or at the top of the scanner, you can also manually enter an ISBN/UPC to search for.
Books published prior to 2005 may not have an ISBN barcode. If you scan an older book, it will likely register a false positive as you are scanning an unrecognized number. For these older books, please enter in the ISBN manually.
Manual: lets you manually enter in a custom entry.
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