Between blotch and blok

With a mac and deliciouslibrary software you can just use a webcam to read the barcode, and it gets everything about the book, including a cover picture if available, off the web. Quite magical!

Welcome to ISBN-13, then. No more silly base-11 check digits.

All ISBN-10 codes will have a corresponding ISBN-13 code. The difference is that there will be 978 prefixed to the code, and the final digit, that check digit that one time in 11 is an X, becomes a true base-10 check digit.

I actually have a book in front of me that displays both.