Indepth tech books?

[rukia_kuchiki]

So I was reading a comptia A+ book and while it goes into some detail, its just not enough for my liking, I was wondering if there are more indepth books about various subjects.

I'm not to interested in the whole network+ or security+ routes and I can't seem to stay focused while just reading tech articles.

If anyone knows any reading material, I am interested.

[Excon]

The internet is your best bet for up to date stuff.