My friend got me into using Linux since he's been a long time user. I installed Ubuntu on my laptop and desktop, was wondering if there were any books Linux users recommended for newbies?

I was looking at the following:

http://www.amazon.com/Beginning-Ubun...2376286&sr=1-1

http://www.amazon.com/Introduction-L...ref=pd_sim_b_4

Wondering if anyone has read this book in the last link, seems more in depth.