Start Unreal Engine 3 for free

As many game programmers know, the famous game engine Unreal Engine is now free to the public. Although you need to pay when you want to sell your games, it is a great chance to get some experience from it. It will also give you better chance to get a job offer.
One who don't find where to start, I recommend the official wiki web site:
http://udn.epicgames.com/Three/DevelopmentKitHome.html
Just focus on UnrealEngine3 not 2. And the name of free version is called Unreal Development Kit (UDK).

You can download the engine for free:
http://udn.epicgames.com/Three/DevelopmentKitGettingStarted.html

There are books in Amazon too: "Mastering Unreal Engine". There are several volumes and several editions. Try to find the latest. As far as I know this book series doesn't cover Unreal Script. You will need to find other books that cover it or you can find the reference page here:
http://udn.epicgames.com/Three/UnrealScriptReference.html

There is also video tutorials which is an easiest and efficient way of learning a tool:
http://udn.epicgames.com/Three/VideoTutorials.html