I am looking for some great Linux books
I would like to find a few Linux books that will give me a great insight on the inner workings of Linux, customizations, and truly understanding what Linux does, how it does it, and how I can make it do other cool things. I am running Ubuntu 8.04 and have been for a good year now and it is great. I can do a good bit of things, but now I want more. I really want to dig deep into the world of Linux. I am looking for just a few great books about and for Linux. Books that will show me how to run different commands, and administrate different things on my network. I need a real good reference book basically. Any ideas would be greatly appreciated.