[Overknown]

Hi
So it seems like I came here a little late in some cases.
The people that are giving away free e-books and free material might got overloaded with people comments and stopped giving the ebooks away. I don't blame them since it is a lot of comments, but now it seems kinda hard to get my hands on some of those books, so I would like to talk with someone that could provide me some material to study.
I'm very interested in pentesting/cyber-security and anything related (black hat hacking etc...)