The Three Investigators are assisted by a Greek youth as they search for clues to a mysterious thief on an island once inhabited by pirates.
Excerpt. © Reprinted by permission. All rights reserved.The Three Investigators made their way into the old cave. Jupiter's flashlight flicked over rocky crevices and ledges.
Suddenly the light stopped. There on the edge of a rocky shelf was a human skull.
It seemed to grin at the boys. And then it spoke to them. "Go 'way," it sighed, with a strong accent that sounded Spanish. "Let me 'ave my rest. No treasure is here. Only my tired old bones!"