Reddit reviews UDK iOS Game Development Beginners Guide

Hey, I'm actually the author of Mastering UDK Game Development. The book covers an awful lot of content and I personally think it's a good value, but if you are just starting out with UDK you could check out my beginner's book as a lot of people told me that was enjoyable to read. I also have a third book coming out next month which is kind of a sequel to that first book leading up to the Mastering book.

That being said, the Mastering Unreal Technology books are what I originally used to learn Unreal and I highly recommend them. However the book was created before UDK came out. I'm sure there are going to be differences (especially with the Content Browser) but it is a great book and I also second that WOLD is an awesome source too.

If you're interested in UnrealScript and coding, Rachel Cordone's book is quite good as well. Hope this helps!