Amazon list of Linux. Good?

[Geek-9pm]

IMO, the books may be good, but the price is way to high for material that is free on the internet. Still wood you buy any of the books if the price were cut in half? (Remember, every book you wood buy hurts a tree.)

Amazon featured list of Linux resources.

1.) Hands-on Guide to the Red Hat(R) Exams: RHCSA™ and RHCE(R) Cert Guide and Lab Manual (Certification Guide) by Damian Tommasino (Apr 30, 2011)

2.) Linux Command Line and Shell Scripting Bible, Second Edition by Richard Blum and Christine Bresnahan (Apr 12, 2011)

3.) Fedora Bible 2011 Edition: Featuring Fedora Linux 14 by Christopher Negus and Eric Foster-Johnson (Apr 12, 2011)

4.) Linux Bible 2011 Edition: Boot up to Ubuntu, Fedora, KNOPPIX, Debian, openSUSE, and 13 Other Distributions by Christopher Negus (Jan 4, 2011)

5.) Official Ubuntu Book, The (6th Edition) by Benjamin Mako Hill, Matthew Helmke and Corey Burger (Jun 20, 2011)

6.) None of the above. All you need to know is elsewhere.

This is a 7 day poll. Vote to see results to date. You can change your vote.

[patio]

(Remember, every book you wood buy hurts a tree.)

Sure...and every time you take a leak you're killin the water supply...

[BC_Programmer]

Remember, every book you wood buy hurts a tree.

Trees are a renewable resource.

The fossil fuels used in some places to generate the electricity used to read an electronic version of said book are not.

As for books, if I'm going to get a book, I'm going to get one that I KNOW is used, and generally accurate- that means something like the Llama book for Perl, or the Mouse book for Python (or the Python book for python, since I somewhat know python (enough to write a chat-script colourizer) and the "mouse" book is a beginner's guide).

There aren't really any "De Facto" standard books for anything but programming languages and a few applications, though.

[Geek-9pm]

Tanks to Patio and BC_programmer for input. 
I have added a seventh item to enlarge the voting options.