I want to book my theory test, how do i do that? Also, is there any preparation material you can reccommend?

Hi,
You can book your theory test online, on telephone and I even heard it through post also. You just need to call the DSA or go on their website.
As for material, lots of books / CDs are available in the market. You can choose whatever suits you. Just make sure they are updated and have official DSA questions.

I booked my theory test online, it's the easiest way - very simple interface. Hmm with regards to preparation, I'd advised you get the official DVLA's theory book and read it. Many (including my driving instructor) told me all you need is the CD (which is MUCH less time consuming), but I wanted to be more thorough so I completed the book which coveres absolutely every question that might come up!

Good luck!