Doctor Richard Waterloo has been hard at work on his book about reality tunnels. He's been teasing it with posts on X. Above is a self-portrait he posted this weekend, presumably showing himself hard at work on the manuscript.
It looks like the book will become available next year. I recently asked him for an update and he said, "Still working on the second revision, first good draft. Then I'll need artists to work up the inside graphics/diagrams/images.
"Looking at 2024 sometime. Winter will give me time to get it straightened out."