The Math Kids Club is back! After solving the case of the prime-time burglars, the Math Kids - Jordan, Justin, and Stephanie - are ready to return to the original purpose of their solving math problems. And the district Math Olympics is the perfect opportunity to do just that. But before they can enter the competition, they need a fourth teammate. The Math Kids set their sights on Catherine Duchesne.Even though Catherine has been quiet in class, she knows some really cool math tricks that are sure to help the Math Kids win the competition. But when Catherine doesn't show up for school and Jordan, Justin, and Stephanie find out her father's been kidnapped, the group springs into action to help their new friend.The Math A Sequence of Events is the second book in the Math Kids series.