"There's nowhere near enough public information about the xz vuln to be worth turning into a book," As an actual person, who reads, and having glanced at this book, I do not agree. I can already see part of the purpose is to put perspective on the crazy reality of backdoors/exploits and the undermined implications thereof. Jia Tan alone could warrant a book or film. It also says "for the general reader" and non-technical, which is where I myself think the importance really is. Maybe the AI is catching blindspots.
I downloaded the book. It's not fake. Perhaps no masterpiece, but far from worthless. Also, not "enough public information" really sells inference and imagination short. There is a rich amount of material to work with here. More than enough.
I am going to go ahead and say that flagging this was more information suppression than crankiness about AI. A lot of folks get strange when Jia Tan or similar subjects come up. I guess it's wiser to just wait until the grid goes down, or the water supply gets a bit more chlorinated....