From publisher blurb: It is circa 400 A.D. and you are a young person living in ancient Egypt. 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?