>On the other hand this book is also available free online [3]. Maybe it is legal to print it and sell it?

No, it's not legal.

I found that Amazon sells what is presumably a genuine edition of the book for $67.

I did not realize that Amazon had started displaying other sellers as the default seller for brand new books that Amazon itself sells. It used to be that Amazon was always the default seller if they carried a book, and the only way you would see other sellers was to click on the link for other sellers. Which is the way it should be. It's insane that they've changed this.