Poll: Which Linux reference book in your country?

Here you can post your Linux reference books that you get/read in your country.

Since the links can contain indirectly also surreptitious advertising should be pointed out. So please link as neutral and close to the creator.

Show others your book or online reading tips that live in your country!

I’ll start:
This is the recognized reference work in Germany
to work with Linux and is also beginner friendly.
Germany: https://kofler.info/buecher/linux/