The Secret of the Sphinx

This time The Hacker is targeting the Sphinx during Napoleon's occupation of Egypt. To their surprise the Adventurers discover that Prof. Krupnik is captive in a virtual prison inside the Sphinx. For the first time they meet The Hacker and realize that he has prepared his final and most vicious blow to disrupt history. The kids and Krupnik narrowly escape The Hacker's attempt to send them back to the Ice Age and only have minutes to prevent the Sphinx from being blown up. Worst of all their only way home is still on the Sphinx and the clock is ticking.