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Simillar with The Secret Kingdom

Lost City of the JungleLost City of the Jungle
The Diamond from the SkyThe Diamond from the Sky
The Great Radium MysteryThe Great Radium Mystery
The Amazing Exploits of the Clutching HandThe Amazing Exploits of the Clutching Hand
Jungle Drums of AfricaJungle Drums of Africa
The Adventures of TarzanThe Adventures of Tarzan
The Sea HoundThe Sea Hound
The Fortieth DoorThe Fortieth Door
The Adventures of Frank MerriwellThe Adventures of Frank Merriwell
King of the CarnivalKing of the Carnival
Jungle GirlJungle Girl
The Secret CodeThe Secret Code
The Blue FoxThe Blue Fox
Blake of Scotland YardBlake of Scotland Yard
Jungle JimJungle Jim
The Black CoinThe Black Coin
Jungle MenaceJungle Menace
The PhantomThe Phantom
Son of the GuardsmanSon of the Guardsman
Jungle RaidersJungle Raiders