Book Series · 1 Book

The Three Investigators Books

The Secret of Terror Castle
The Secret of Terror Castle
The Secret of Terror Castle
The Secret of Terror Castle
The Secret of Terror Castle
Where the story begins

First Book in the Series

The Secret of Terror Castle
Sale price
$379
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
$3.99Save 5%
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?
In reading order

The Three Investigators Series

1 book · Published 1964

Good to know

Common Questions

How many books are in the Three Investigators series?

There is one Three Investigators book so far: The Secret of Terror Castle.

What ages are the Three Investigators books best for?

The series is best for ages 8–12, based on the age ranges of the individual books.

The people

The Creative Behind the Book

The people who bring The Three Investigators to life.

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