I am going to let the Refs... series die an uneventful death; hopefully this is what actually happens to the idea of refs in ultimate. In the next couple of months I am going to talk a lot more about coaching, beginning with discussion of this book. If you haven't read it, you should. I originally read it in my early days as a leader on Sockeye (99?) and coaching Syzygy. It really set me on the philosophical path I have followed ever since. I am excited to read it again after a second decade of ultimate and see what it has to say.
On a related used book store note, I also found this in the ultimate frisbee section (!?) for $3. It's so outdated that it lives and is thought-provoking in an just-different enough kind of way.