Coco and Cavendish: Fire Dogs — Judy Sierra

After Coco and Cavendish's adventure in the Step into Reading book Circus Dogs, the poodle and Border collie want to try their paws as fire dogs. But their old rivals Torbo and Orbot, two nasty robot dogs, have ideas of their own. How the two lovable dogs save the day concludes another deliciously satisfying story for beginning readers.