Which book/site you learned the most basics of your field?

I deleted Facebook around 2016 and did a lot of reading.

The Art of Deception and The Art of Intrusion were good, but are outdated and more to be read as historical documents at this point.

If you wish to master disinformation, "The Prince", "The Art of War" and "The Rise and Fall of the Third Reich" are all required reading.

Also, read the translator's notes prepending the English version Mein Kampf, but the text itself is not very interesting. Skip it and pick up a copy of "The Commandant" by Rudolph Hess, along with "Eichman in Jerusalem" if you want to learn how to influence people at scale.

Oh, and Helter Skelter. Don't forget that one.

(Generals do not face each other in battle... they send their troops to do their bidding.)

Fictionwise, read Lolita, Convenience Store Woman, Post Office, and The Temple of the Golden Pavilion.

It was a whole zoo of O'Reilly books, including

UNIX Systems Administration

The Perl Cookbook

DNS and BIND

AWK

and too late for me to learn the basic, but valuable nonetheless: The Practice of System and Network Administration.

Making Movies by Sidney Lumet and Leading by SAF taught me more about management than any other books.