You don't seem to be a formal coauthor of the book, so your relationship is informal in a way that a Phd supervision isn't. The book also doesn't list you as editor but under "friends or colleagues" while he does mention that he does have a relationship with someone he calls copy-editor.
You seem to be implying I'm a liar while focusing on making factual claims in a intentionally biased way (you just saw, but omitted, relevant information b/c it doesn't help "your side", which is to attack me).
Your framing here is as dishonest, hostile, and unfair as usual: I did not claim to be a coauthor.
You are trying to attack informality as something bad or inferior, and trying to deny my status as a professional colleague of Deutsch who was involved with the book in a serious way. You are, despite the vagueness and hedging, factually mistak...