When a famous millionaire asks young detectives Max and Maddy Twist to investigate who is sabotaging an international balloon race for charity, they find themse
Bestselling novelist Alexander McCall Smith introduces readers to a delightfully funny pair of heroes--and the tricky villain who's always keeping them on their
Asked by a Swiss banker to investigate a series of bank robberies committed by dogs, young detectives Max and Maddy Twist travel to Switzerland, where they disc