Any Unity 4.0 books?

I was wondering if there are any new books out for beginners to get started with unity 4.0 as I want to start learning to use it so that when windows phone 8 support comes out I can start making games for that and hopefully Windows RT as well.

Not for unity 4 only, but there are some great books on unity 3 which should do just aswell.

Is there one that you recommend?