"[An] intense, multilayered story." —Jami Attenberg, New York Times Book Review

Software prodigy Josie Ashkenazi has invented an application that records everything its users do. When she visits the Library of Alexandria as a tech consultant, she is abducted in Egypt's postrevolutionary chaos with only a copy of the philosopher Maimonides' famous work to anchor her—leaving her jealous sister Judith free to take over her life. A century earlier, Cambridge professor Solomon Schechter arrives in Egypt, hunting for a medieval archive hidden in a Cairo synagogue. Their stories intertwine in this spellbinding novel of how technology changes memory and how memory shapes the soul.