Stability of URL ================ I found 17 year old link to a book on the one of the biggest bookseller's website [1]. The link was published in Palm Tipsheet from 2002. So I hit the link - AN IT WORKED and pointed to a correct book (and one book is still available!) Unbelievable. Reference: [1] http://www.amazon.com/exec/obidos/ASIN/0471089656/therohdesignwebs