All my life I've unfortunately been confined to Windows for convenience as I'm completely new to anything other than Windows. My friend lent me a book on Ubuntu but tbh it's aimed at complete computer novices so isn't of much use.
What books would people recommend to give me a solid foundation in Linux while at the same time allowing me to expand further on various areas if I so choose? I guess I'll be getting Backtrack for pentesting and so far have a copy of Ubuntu I'm messing around with on my older computer so don't know how much those will effect book choices.
So far the two books I'm looking at are Linux command line and shell scriptiong bible and Backtrack 4 assuring security through penetration testing. Are both good choices? Is it even worth getting the Backtrack 4 book when Backtrack 5 is out?