I strongly advise that you read, The official Highway Code, Know Your Traffic Signs, and Driving the Essential Skills. They are invaluable reading when learning to drive, and usefull for keeping up to date throughout your driving career.
You can purchase these books by clicking on the links below.
To prepare yourself for the new theory test which starts on the 23/01/12, I recommend you buy the DSA latest Learning material, by clicking the link below.