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

Lions and tigers and bears oh my!Karen's class is studying wild animals. They are going to see some at the zoo. Karen and her friends can't wait for their field trip. But then the "mean green bug" hits Ms. Colman's class. Everyone is getting the flu! Karen hopes the school trip doesn't get canceled. But she doesn't want to give the animals the bug, too!