In this third installment of the hilarious books featuring zookeeper Bob McGrew and his zoo animals, the group travels along with Hector Gloop, the famous poop collector, to an island in search of a sample of elusive dinosaur poop. Will they find it? Zookeeper Bob McGrew and poop collector Hector Gloop are back for another hilarious poop-filled adventure! The two, as well as all of the zoo animals, travel to an island in search of a sample of elusive dinosaur poop for Hector's collection. But when they get there, they are chased by a Tyrannosaurus rex--and bring home a special friend!