The unreal engine is a professional engine, made available to everyone. Getting started with it can be a real challenge, but this book walks you through creating a game step by step. Starting with first creating a room with lighting, to moving on and creating an outside, sky dome, buildings, enemies and AI, you’ll understand the basic tools, and how to start using it to create your own game! The book touches at least on a little of everything that you’ll need, custom models and textures, and the two types of scripting available to you. It also shows you hopw to deploy to your idevice for testing, as well as troubleshooting, ending with instructions for actually submitting your game to apple for approval on the app store.

If you’ve been looking to start with the UDK, this is a great resource. If you’d also like to learn how to deploy that game to idevices, then this book would be perfect for you.

You can pick up the book here:
http://www.packtpub.com/unreal-development-kit-ios-game-development-beginners-guide/book