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The Mystery of the Monster Moun - M. V. Carey
SUMMARY:The three young sleuths solve a case of double identity while investigating the legend of Monster Mountain. -
The Mystery of the Moaning Cave - William Arden
Product DescriptionWhile vacationing on a California ranch, three boys decide to investigate strange wails that come from a mysterious cave where a famous outlaw disappeared. ... -
The Mystery of the Laughing Sha - William Arden
Product DescriptionThe three investigators try to solve a mystery involving a gold Indian amulet and a weird laughing shadow that appeared to them in the night. -
The Mystery of the Kidnapped Wh - Marc Brandel
Product DescriptionThe three investigators, attempting to rescue a beached whale, end up searching for sunken treasure. -
The Mystery of the Invisible Do - M. V. Carey
Product DescriptionThe Three Investigators are hounded by supernatural forces as they attempt to recover a stolen sculpture of a legendary wolf-dog. -
The Mystery of the Flaming Foot - M. V. Carey
SUMMARY:When an eccentric local artist disappears suddenly, the three investigators look into the matter. -
The Mystery of the Death Trap M - M. V. Carey
SUMMARY:The Three Investigators, aided by their friend Allie, try to untangle the unusual circumstances surrounding an abandoned mine. -
The Mystery of the Deadly Doubl - William Arden
SUMMARY:The Three Investigators foil a plot to kidnap the son of a political leader in an African colony. -
The Mystery of the Dancing Devi - William Arden
SUMMARY:The Three Investigators search for a stolen statue only to find that it has mysteriously come to life. -
The Mystery of the Coughing Dra - Nick West
SUMMARY:When five dogs disappear from a seaside town and a dragon is sighted off-shore, the Three Investigators look into the situation.