Ask HN: Where can I start learning about hacking?

I'm an experienced developer but I can't get a job as a developer but honestly I had long ago started hating every second I spent writing software.

Instead of crying about not being able to get a job I guarantee I'll hate and will make me less of a person and generally unhappier I've finally had enough of a break from the iq-toxic environment that encompasses all of software development that I think I might be able to enjoy learning something new and maybe I'll get a job the specializes in that.

Two things come to mind. Machine learning and hacking. I think machine learning will be too similar to normal software development though. So maybe hacking is a good direction for me to try.

I've tried and failed with metasploit in the past. Failed because I couldn't find a good book. I know to be a hacker you have to know about a lot of things. I'm more interested in hacking into networks, finding vulnerabilities, and exploiting them. All legally, of course.

Please tell me what book I should read first. Thank you, and I will see you in Zion.