Superstore surprise (geronimo stilton #76)

When you're with Geronimo Stilton, it's always a fabumouse adventure!

My cousin Trap was opening a superstore! I was excited for the grand opening but, holey cheese, it was a disaster! The lights wouldn’t go on, the speakers were broken, and something was stinking up the place. Someone was trying to sabotage the store. But who could it be… and why?