Choose Your Own Adventure SPIES: Spy for Cleopatra by Katherine Factor takes YOU to ancient Greece where you're faced with a mission larger than any ancient pyramid! 9-12 year old readers travel back in time to try and change history and must choose what happens next in the story. Choose Your Own Adventure SPIES: Spy for Cleopatra is an interactive adventure book in which YOU decide what happens next. It is circa 400 A.D. and you are a young person living in ancient Greece. You are studying with the powerful philosopher and mathematician, Hypatia. Hypatia's formulas and inventions will change the course of history, but she can't let go of an event from the past. She needs you to travel back in time to the age of Cleopatra in order to change history so the Library of Alexandria can be saved from destruction by fire. Can you do what's needed to preserve the world's most important knowledge?