Eek no!
Source of confusion -- do you mean Linux the kernel, or Linux the operating system (better called GNU/Linux)?
The link to linux.org that Ethel supplies is for the kernel. This won't be much use to you.
That book focuses on Fedora Core 6 -- just one distribution (distro) to choose from.
Here's the idea -- instead of using Microsoft of Apple or someone for your operating system software, why not use lots of software from different people who make it free software (not free in price, but free in freedom). Meaning that anyone can do anything to it -- alter it and redistribute (share) it in any way they like.
Because of this, there is obviously different ways of packaging up all this different software. You may want to use some system with some image editor, or some other word processing software, etc. Therefore, there are lots of different distributions.
Some good ones include Gentoo, Fedora, and Ubuntu.
Ubuntu has become very popular in the last year or so, gaining more support than other distributions. It's totally free to download and comes as a liveCD. This means that you can stick it in your computer and boot from it, to try out Ubuntu, without even touching your hard drive. Take out the disc and restart, and you're back to Windows without even knowing you'd ever tried Ubuntu.
http://www.ubuntu.com/
Because of its popularity, you'll find much good advice in the forums on their website, and some good books too, specifically tailored to Ubuntu.
A book like "Linux for Dummies" will not be good since it's tailored to some other distro, which will work in different ways and in any case will now be out of date.