Merlin's Justice

Disappearances, fatal 'accidents', feuds and even murder: the mouse community in London's Underground is falling apart. Gio Knightsbridge is keen to find out who is causing all the mayhem and why. When little Sport accidentally witnesses another murder, Gio is outraged!
With the help of his best friends, Lily and Courty, he throws his energies into the puzzle. He learns a lot from Léon the French mouse, Jazz an umpire, Flint O'Gravy who battles the rats along Westminster, and even his father, Umpire of the Piccadilly line. The evidence points to one mouse. But what could be the reason? Finally, Gio guesses at the Grand Parley when it is almost too late. Trapped into a duel, he risks everything to win, but Gumley Theydon Bois is a known cheat . . .