It's even more worrying when you look at the contents of these "books", they are riddled with erros:

https://infosec.exchange/@lcamtuf/116785283147249092

That's a generalization from 1 book. I went and looked at ten or so. This is not actually the case. There's something more complex going on.

* https://mastodonapp.uk/@JdeBP/116788511790947929

Truly sad state of affairs

This is atrocious