Series Alfred Hitchcock and The Three Investigators
Author Robert Arthur
Year 1975 (first published 1967)
THE THREE INVESTIGATORS
“We Investigate Anything”
This is The Three Investigators’ business card—and their first assignment: to investigate a haunted house for that Master of Mystery, Alfred Hitchcock. But Terror Castle, looming through the mists of Black Canyon, seems to have more than its fair share of spooks . . .
The Secret of Terror Castle available on Amazon