The Penguin Pool MurderFor the third graders at Jefferson School, a field trip is always a treat. But one day at the New York Aquarium, they get much more excitement than they bargained for. A pickpocket sprints past, stolen purse in hand, and is making his way to the exit when their teacher, the prim Hildegarde Withers, knocks him down with her umbrella. By the time the police and the security guards finish arguing about what to do with Chicago Lew, he has escaped, and