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?

Originally published in hardcover beginning in 1964, these classic mystery/adventure stories feature three boys--Jupiter Jones, Pete Crenshaw, and Bob Andrews--who establish a detective firm with the motto "We Investigate Anything!"

Perfect for summer reading, these suspenseful action stories will appeal to both boys and girls.