I was intrigued by an entry in Simon Cozen's blog. He supplies the ISBN number and downloads information about his books (title, publisher, author etc) via Net::Amazon. This is then inserted into a database.

I wouldn't mind doing this for my own books. I'm wondering if it's possible to make things even easier by removing the keying step entirely. Do you know if any of the barcodes on the back of most books is an ISBN number?