There is a lot to read about the book A History of The White and The Blank Theorem in rez Magazine.

In the issue February 2019 you find it here … Page 26ff Backdoor and 38ff Blank Theorem and the Interview

The March issue has been published … TheBlankTheorem

And the books are on Amazon. Enter Erva.Re in Amazon to get both editions, the Blank one and the Wittgenstein edition.