The Beast of Buckingham Palace, from Children's author David Walliams.

It is 2120 and London is in ruins.

The young Prince Alfred has never known a life outside Buckingham Palace – but when strange goings-on breach its walls and stalk the corridors in the dead of night, he is thrust into a world of mystery, adventure and monsters.

And when his mother, the Queen, is dragged away to the Tower of London, Alfred must screw up his courage and battle to save her, himself… and the entire city.