Following up with some feedback on another forum post , I'm pleased to announce that our publisher Wiley has agreed to release the code examples for the English book under BSD license. This enables me to put them online on GitHub: http://github.com/chillu/silverstripe-book/
There's one gotcha: The book examples were written for SilverStripe 2.3.0, which currently only works with PHP 5.2.
Would anybody be willing to test the projects on SilverStripe 2.3.7 and PHP 5.3? I don't expect big problems, its just a bit of manual testing.
If you're keen, please fork the repo and send me pull requests with any bugfixes.
Also, is anybody willing to go through the existing (code-related) book errata on the wiki and fix them in the examples? (http://doc.silverstripe.org/silverstripe-book-errata) Again, git pull requests are the preferred way to send those back.