Book #1 · Chapter Book · Ages 8–12 · 1964
The Secret of Terror Castle
A haunted house visit turns terrifying for young detectives.
192 pages· 37,270 words· Est. 5 hour read
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Paperback
Summary: The Three Investigators, eager to boost their detective agency's fame, venture into Terror Castle, a haunted mansion once owned by a horror-movie actor. What begins as a thrilling adventure quickly spirals into a night of spine-chilling encounters. As eerie sounds and ghostly apparitions emerge, the boys must unravel the castle's dark secrets before they become its next victims. Will they uncover the truth behind the haunting, or will Terror Castle live up to its name?









