When clicking the Amazon links at Stuff and Nonsense, you get the following URL:
It's a little hard to buy the book from a 404 page.
It took a little while to get our ducks in a row, but with the relaunch of the last of my three sites at http://stuffandnonsense.co.uk I've been back over the book buying issue.
Instead of hosting any product information locally, I decided that it was best to point people to an Amazon Store. Amazon's HTML and CSS is horrible to work with, but there are now stores themed like http://forabeautifulweb.com/ and http://transcendingcss.com/
You shouldn't find the broken link anywhere on the sites. If you do find a stray one, please let me know.