book cover of Challengers of the Unknown
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Challengers of the Unknown

(1977)
A novel by

 
 
Essef / Horror - The world's boldest trouble chasers search for the truth behind the occult and mysterious! Deep in the South American jungle, a real and sinister menace lurks in the shadows of the supernaturel...



Used availability for Ron Goulart's Challengers of the Unknown


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