The Riddle of the Sphinx - Ken Warner

Can Malia and Jaden find the Sphinx before they exterminate humanity?A mysterious entity known only as “The Sphinx” is planning to exterminate humanity. But who—and where are they? And how—and when will they carry out their plans? Can Malia and Jaden find them before it’s too late?If you like fast-paced sci-fi thrillers, you’ll love fourth sequel to The Secret of Giza!