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 rest easily, and an Abyssinian cat named Sphinx suggests that more is at stake...
When Ra-Orkon, a 3,000-year-old mummy, begins to whisper strange words in an ancient Egyptian tongue, the Three Investigators are determined to find out the facts: Why is he speaking? What is he saying? And how is the horrible curse of Ra-Orkon about to be fulfilled?