3A
   [The Secrets of Droon #4]City in the Clouds
   Tony Abbott
   Scholastic
   Paperback + Audio CD
   88
   10000
이럴수가! 닐이 또 다시 벌레로 변해버렸습니다. 구름 위 도시에 가면 치료 약이 있을지도 모른다는 키아 공주의 말을 듣고 에릭과 줄리는 친구를 돕기 위한 모험에 나섭니다.