It is http://programmer.97things.oreilly.com/wiki/index.php/Contri...

If it isn't, all you need to do is flag it.

This looks to be the main content of the book:

http://programmer.97things.oreilly.com/wiki/index.php/Contri...

That was mentioned three years ago: https://news.ycombinator.com/item?id=3589963

The site appears to use a loose definition of free.

> "loose definition" How so? I state quite explicitly what sort of content is welcome. If the contents of the book are available for free from a site controlled by the author(s) or publisher, it is free enough for the purposes of the site. If you care enough and find a book that doesn't meet that standard, you can flag it, and I can have a look to confirm this.

True. but on the other hand, it is a good list of books for the HN crowd. That in itself makes this site a good resource. Lets focus on the positive here...