What do you do when the Queen is struggling with a knotty maths problem that only you, Billy Brown, can explain? You travel to her palace in the middle of the night and help the nation, of course! In return, the Queen now wants to come and visit - and you can't say no to royalty. But the Queen's suitcase contains two tiaras, a spare crown, three evening gowns, a silk dress and a pair of green wellingtons - nothing remotely suitable for visiting the bottle bank. Fitting in is tricky when you're so magnificently different. A right royal riot of a read!

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