From the bestselling author of the generation-defining series The Baby-sitters Club comes a series for a new generation!

Whodunit?Karen loves playing on her big sister's softball team, Kristy's Krushers. But then Karen sees strange things going on at practices. Softball gloves and bats are disappearing. Pages are missing from Kristy's notebook. Who is doing this? And why? Karen and her friends are going to try to find out. Can they save Kristy's Krushers?