The St Patrick's Day Shamrock Mystery

First a mysterious shamrock appears on Miss Wink's front door. Then Kate and Mickey find the sign on their new clubhouse: "The Green Shamrock Gang Was Here." Something very strange is going on in Springvale - a real challenge for the Dixon twins' talents. Mickey Dixon wants to be a sleuth like Sherlock Holmes when she grows up. Kate hopes to be a famous scientist. Together, they make a great detective team. But this case is different from any of their other adventures and it takes both twins' skills to solve the mystery. Before the busy St. Patrick's Day ends, the twins make some surprising discoveries and, best of all, have a new friend.