Hi All,
I saw this on facebook so me and my kids had fun finding the answer on the internet this morning and the prize was 20% off books. Thought we might share it.
This online bookshop have hidden a button on their website on one of the product pages and you follow the clue to it. I don't want to give it away, but the answer was a book most kids know and mine got it almost straight away (after a little hint!).
The clues are on here: www.facebook.com/hivestores