Windows 2k3 Server Enterprise edition

I just got my hands on a version of the software from my MSDN account with the company I'm with. And I set it up on a machine at home to learn the system, get a feel for it. And learn networking on a "Desktop" level. So far I have active directory set up, webserver, database, and applications server all set up on it. But I want to dig into this and other things in more detail. I suppose the main point to being this is that I can't afford the book for this OS. And I was curious as to if anyone on here had an E-Book available for this. I tried to find one on the net but I can't seem to locate it. If anyone has any information, or even any tips on this software. It would be greatly appreciated. As I'm striving to learn all I can about the technological world as of yet.