Currently, there is a printing of Princess Celestia: The Changeling Queen by vren55 from the Nonexistent Publications team. You can order a copy by filling out the order form and then buying it at the nonexistent website. Updates on the book's development can be found in there Book production discord server.

Sorry if it’s so late, but is there still a chance to purchase it? I went to the order page, and I didn’t see it available.