The Hardy boys mystery storiesBook 1 of 2
The Demon's Den
The Hardy boys, vacationing in Vermont, offer to help the police locate a missing camper and find themselves involved with a doomsday cult, a deadly strain of bacteria, and possibly the devil.
GenresJuvenile FictionAction & AdventureMysteries & Detective Stories
200 pages
English edition · First published 1986 by Pocket Books · ISBN 9780671626228
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