In the third adventure of Robert Arthur’s classic mystery series, Jupiter, Pete, and Bob encounter Ra-Orkon, the mummy of an Egyptian prince dead for three thousand years. But sometimes the dead don't…
Three young sleuths uncover a mystery buried since World War II when they come to the aid of a trouble-plagued environmentalist who is protesting the drilling of off-shore oil wells.
Why would someone want a clock that screams? In the ninth adventure of Robert Arthur’s classic mystery series, the Three Investigators have to find out. The answer could help Jupiter, Pete, and Bob fr…
