There are I suggest four books to either purchase or if your library has them, borrow them instead.

They are

“Know your Traffic signs” which can be purchased from here

http://www.amazon.co.uk/Know-traffic-signs-Driving-Skills/dp/0115528555/ref=sr_1_1?s=books&ie=UTF8&qid=1358721616&sr=1-1

“The Official Highway Code”

http://www.amazon.co.uk/Official-Highway-Code-Department-Transport/dp/0115528148/ref=sr_1_2?s=books&ie=UTF8&qid=1358721616&sr=1-2

“The Official DSA Theory Test for Car Drivers Book 2013 edition”

http://www.amazon.co.uk/Official-Theory-Test-Drivers-Book/dp/0115532315/ref=sr_1_3?s=books&ie=UTF8&qid=1358721616&sr=1-3

“The Official DSA Guide to Driving the Essential Skills”

http://www.amazon.co.uk/Official-DSA-Guide-Driving-Essential/dp/0115531343/ref=sr_1_4?s=books&ie=UTF8&qid=1358721616&sr=1-4