Download the book
You can download a PDF or EPUB version of Working with Stories for free. It is licensed under the Creative Commons Attribution-ShareAlike 3.0 Unported License.
Actually, don't do that. Download the the new pre-publication draft of the 4th edition of Working with Stories, which you can find on the More page.
If you find Working with Stories useful, consider making a donation (see below) or buying a print or Kindle copy (but maybe wait until WWS4 is published). I put two and a half person-years into the book project (and another year into the book's expanded 4th edition), and that investment definitely wasn't free.
If you really can't pay (even the cost of a cup of coffee), pay it forward by using the book for something good. But if you can help out, I would appreciate the help very much. I'd like to keep doing this work!
And by the way, if you're looking for some help doing PNI projects, I offer coaching and support.