What is the most detailed Ubuntu book?

[Odd]

mdovell at comcast.net wrote:
> I know that there are short guides sometimes but I was thinking of 
> something mostly complete and current. Or it would it be a bit better to 
> wait for 10.0 since it's a LTR? I think I'm learning more as to how to 
> use Ubuntu but more is always better.
> 
> Would a book on bash shell also be good?

Here are some books:

Ubuntu Linux Secrets
http://www.amazon.com/Ubuntu-Linux-Secrets-Richard-Blum/dp/0470395087

Beginning Ubuntu Linux, Fourth Edition
http://www.apress.com/book/view/9781430219996

Ubuntu Kung Fu
http://www.pragprog.com/titles/ktuk/ubuntu-kung-fu

-- 
Odd