Adam, the book I have is actually the ATPL book for Radio Navigation so I figured it would be useful for the kinds of things that ATCOs use on a regular basis. I think the interview involves asking you questions about things you know about ATC so I just want to make sure I'm showing that I'm motivated enough to look into these things.
Ive booked my S3 for 10th November. Short timing as I come back from Aus on the 23rd!! I cant wait though!