Chapter Four of the Simple Explanation book, "It All Starts With A Donut--Tori and Toroidal Flow" is completed. I'm not going to post it to the blog, though, because there are so many illustrations it would take me too long to translate it from the book format to the blog format. Meanwhile, just read all of the toroid posts available here at the topical index to the right. That will tell you what's in the chapter.
Now there's just the Introduction and a wrap-up chapter to complete. I'm planning on self-publishing the Simple Explanation book. Right now I'm gathering together some reviewers to read the Proof Copy and make some initial reviews. If you would like to be a reviewer, please let me know.