When I try to do so the site takes me to the shopping card and returns this:
"Invalid Product(s) - (SKU-KIT-9781449382681.EBOOK)."
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The reason you are getting that error is that there is a new edition of that book available, and that ebook upgrade button used to change to the next edition upgrade. Since you couldn't purchase that ebook upgrade, I just went ahead added it to your oreilly.com account.
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