In the third installment of Suzanne Collins's New York Times bestselling The Underland Chronicles, Gregor must stop a plague from spreading through the Underland.With two prophecies fulfilled, Gregor is now focused on the Prophecy of Blood, which calls for Gregor and "the princess," Boots, to return to the Underland to help ward off a plague. His mom agrees to let them go--on the condition that she travels with them.When they arrive in the...