I'm kind of amazed that the two links to Amazon and Barnes & Noble still work. Talk about backwards compatibility! Amazon has probably changed dozens if not hundred of things server side since 1999.

Old link - http://www.amazon.com/exec/obidos/ASIN/0517149257/o/qid=9295...

New link - http://www.amazon.com/Ultimate-Hitchhikers-Guide-Douglas-Ada...