The Riddle of the Red Purse (Polk Street Mysteries Series #2)

Dawn Bosco uses math, logic, and her detective skills to return a red purse to its rightful owner

When Dawn Bosco finds a red purse on the playground after school one day, she knows she's also found a new mystery to solve. But after she puts up posters and makes an announcement on the loudspeaker, too many people are trying to claim the purse!

The only clues are a shopping list, some money, and some dust that looks like cookie crumbs. Dawn will have to figure out the riddle of the purse...