Page 12 notes this:

"As you read the book’s chapters, you’ll encounter a number of living examples—step- by-step tutorials that you can build yourself, using raw materials (like graphics and half-completed web pages) that you can download from www.sawmac.com/css3/."

If you go to the specified URL, it doesn't exist and instead redirects you to another page. It basically looks like sawmac.com has not been updated in a bit (or they're waiting on the dead tree release of the book on 1/2/2013).
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