City in the Clouds (The Secrets of Droon #4)

#1 · Secrets of Droon: Vol1(lib)(CD) #2 · Journey to the Volcano Palace (The Secrets of Droon, Book 2) #3 · The Mysterious Island (Secrets of Droon #3) #4 · City in the Clouds (The Secrets of Droon #4) #6 · By Tony Abbott The Sleeping Giant Of Goll (The Secrets Of Droon #6) #9 · The Secrets of Droon #9: The Tower of the Elf King #10 · Quest for the Queen (Secrets of Droon #10) #11 · By Tony Abbott The Hawk Bandits of Tarkoom (The Secrets of Droon #11) #12 · The Secrets of Droon #12: Under the Serpent Sea #13 · The Secrets of Droon #13: The Mask of Maliban #14 · The Secrets of Droon #14: Voyage of the Jaffa Wind #15 · The Secrets of Droon #15: The Moon Scroll #16 · The Secrets of Droon #16: The Knights of Silversnow #17 · The Secrets of Droon #17: Dream Thief #18 · Search for the Dragon Ship (Secrets Of Droon #18) #19 · The Secrets of Droon #19: The Coiled Viper #21 · The Secrets of Droon #21: Flight of the Genie #22 · The Secrets of Droon #22: The Isle of Mists #23 · The Secrets of Droon #23: The Fortress of the Treasure Queen #24 · The Secrets of Droon #24: The Race to Doobesh #25 · The Riddle of Zorfendorf Castle (The Secrets of Droon #25) #26 · The Secrets of Droon #26: The Moon Dragon #27 · By Tony Abbott - The Chariot of Queen Zara (Secrets of Droon #27) (2006-04-16) [Paperback] #29 · Pirates Of The Purple Dawn (The Secrets Of Droon #29) #30 · The Secrets of Droon #30: Escape from Jabar-loo #32 · The Treasure of the Orkins (The Secrets of Droon #32) #33 · The Secrets of Droon #33: Flight of the Blue Serpent #34 · The Secrets of Droon #34: In the City of Dreams #35 · The Secrets of Droon #35: Lost Empire of Koomba #36 · The Secrets of Droon #36: Knights of the Ruby Wand