Don't know how useful – ISBN Scan - OCR/BarcodeScanner Review

I tried scanning the ISBN of four books that I have on my nightstand. It eventually got all four correct, although it wasn't clear whether it was recognizing the numbers or the bar code. It gave me correct info on each book, but since I already had the books, that info wasn't of much value. When do I ever encounter an ISBN code without the book?
Review by Geoff123456 on ISBN Scan - OCR/BarcodeScanner.