Juvenile Series and Sequels

Author: Robert Arthur

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Three Investigators (Juvenile)
#Book Title
 1Secret of Terror Castle, The
 2Mystery of the Stuttering Parrot, The
 3Mystery of the Whispering Mummy, The
 4Mystery of the Green Ghost, The
 5Mystery of the Vanishing Treasure, The
 6Secret of Skeleton Island, The
 7Mystery of the Fiery Eye, The
 8Mystery of the Silver Spider, The
 9Mystery of the Screaming Clock, The
 10Mystery of the Moaning Cave, The
 11Mystery of the Talking Skull, The