In Andy McDermott's brilliant fifth novel, Nina Wilde and Eddie Chase are on the hunt for the lost pyramid of Osiris... The incredible secret of the Great Sphinx of Egypt is about to be revealed. An archaeological dig is preparing to open the Hall of Records, a repository of ancient knowledge hidden beneath the enigmatic statue. But on the night of the unveiling student Macy Sharif makes a shocking discovery: a religious cult already raiding the Hall of Records to find the location of the mythical Pyramid of Osiris. Framed by corrupt officials, she goes on the run, trying to reach the only people who can save her before she is silenced - permanently. Discredited, jobless and broke, archaeologist Nina Wilde and ex-SAS soldier Eddie Chase have problems of their own - until Macy's plea for help sends them on a deadly quest across the globe as they try to reach the mysterious pyramid before Khalid Osir, the charismatic leader of the Osirian Temple. But is the cult's motive purely greed... or something more sinister?