I would guess it’s for secure boot support.

Nah I think it was a company called “Packt” that everyone in the thread was complaining about so hopefully this one is different. But for sure would love to hear from someone who has read them.

It will depend on the books maybe someone already has read them can chime in. But I saw a post like this for golang, and everyone in the comments were saying the books were ai generated crap.