This is a good question. I have them listed on my various websites, but it’s still not as easy to suss out as I’d like.
I currently have five books that are still available in print. Following these links takes you to the page where you can buy them.
All of my books are also available for the Kindle/iPhone Kindle App, at Amazon.
Sometimes there are copies of my books at Powell’s in Portland or Quimby’s in Chicago, but I don’t have tons of insight into availability there. I am always open to additional suggestions.