It's a dark, dark night in Trinity College… The night-time cat, Pangur Bán, sneaks out of the Book of Kells, on the prowl for a plump, grey mouse. She searches the library, Front Square, the theatre, the rugby field, the rooftop, the swimming pool and even the underground.

But nobody can help her find the mouse - not even the ghosts of Oscar Wilde, Dracula and the Queen of England. Will Pangur Bán ever catch that mouse?

Erika McGann is a celebrated children's author, and winner of the 2014 Waverton Good Reads Children's Award.